Every reference with a DOI in the deposited reference list resolved to a known
work in Crossref or DataCite at the dated check, and none carried a retraction,
withdrawal, or removal notice.
The 26 checked references that resolve
resolves10.1007/s11368-017-1678-4Organic matter transformation and porosity development in non-reclaimed mining soils of different ages and vegetation covers: a field study of soils of the zinc and lead ore area in SE Poland
resolves10.1016/j.geoderma.2015.07.018Natural restoration of soils on mine heaps with similar technogenic parent material: A case study of long-term soil evolution in Silesian-Krakow Upland Poland
resolves10.1080/09669580308667219Assessment on and Perception of Visitors' Environmental Impacts of Nature Tourism: A Case Study of Zhangjiajie National Forest Park, China
resolves10.1016/j.soilbio.2008.03.023Suitability of enzyme activities for the monitoring of soil quality improvement in organic agricultural systems
resolves10.1016/j.chemosphere.2017.03.106Comprehensive assessment of heavy metal pollution in topsoil of historical urban park on an example of the Planty Park in Krakow (Poland)
resolves10.1016/j.scitotenv.2004.10.005Soil enzyme activities as affected by anthropogenic alterations: intensive agricultural practices and organic pollution
resolves10.1016/j.envpol.2011.12.041Multivariate statistical and GIS-based approach to identify source of anthropogenic impacts on metallic elements in sediments from the mid Guangdong coasts, China
resolves10.1016/j.apgeochem.2016.02.004Contamination, bioaccessibility and human health risk of heavy metals in exposed-lawn soils from 28 urban parks in southern China's largest city, Guangzhou
resolves10.1016/j.soilbio.2004.07.003Soil moisture pre-treatment effects on enzyme activities as indicators of heavy metal-contaminated and reclaimed soils
resolves10.1016/j.gexplo.2016.03.007Urban park soil contamination by potentially harmful elements and human health risk in Peshawar City, Khyber Pakhtunkhwa, Pakistan
resolves10.1007/s00374-011-0570-4Intra-annual variation in biochemical properties and the biochemical equilibrium of different grassland soils under contrasting management and climate
resolves10.1007/s00374-011-0644-3Soil biochemical activities and the geometric mean of enzyme activities after application of sewage sludge and sewage sludge biochar to soil
resolves10.1016/j.ecoenv.2015.06.019Assessment of heavy metal pollution and human health risk in urban soils of steel industrial city (Anshan), Liaoning, Northeast China
resolves10.1016/j.jenvman.2016.05.074Assessment of the risk of pollution by sulfur compounds and heavy metals in soils located in the proximity of a disused for 20 years sulfur mine (SE Poland)
resolves10.1016/j.apsoil.2016.02.012Tree species and soil substrate effects on soil biota during early soil forming stages at afforested mine sites
resolves10.3390/ijerph13111119Heavy Metal Pollution in Settled Dust Associated with Different Urban Functional Areas in a Heavily Air-Polluted City in North China
The 12 references without a DOI — listed, not checked
no DOI — not checkedCiarkowska K (2010) Effect of fertilization on the structure of upland grassland soil. Pol J Environ Stud 4:693–697
no DOI — not checkedCiarkowska K, Gambuś F (2005) Micromorphometric characteristics of upper layers of soils contaminated by heavy metals in the vicinity of a zinc and lead ore plant. Pol J Environ Stud 14(4):417–421
no DOI — not checkedCiećko P (2016) Report on the state of the environment in Malopolskie voivodship in years 2013-2015. http://www.krakow.pios.gov.pl , 19.06.2017 (in Polish)
no DOI — not checkedGorlach E, Mazur T (2001) Agricultural chemistry. Basics of Nutrition and Principles of Fertilization. PWN, pp 347 (in Polish)
no DOI — not checkedHendershof WH, Lalande H, Reyes D, MacDonald JD (2006) Trace element assessment. In: Carter MR, Gregorich EG (eds) Soil sampling and methods of analysis. Taylor and Francis Group, LLC, New York
no DOI — not checkedKabala C, Chodak T, Szerszen L, Karczewska A, Szopka K, Fratczak U (2009) Factors influencing the concentration of heavy metals in soils of allotment gardens in the city of Wroclaw, Poland. Fresenius Environ Bull 18(7):1118–1124
no DOI — not checkedOgunkunle CO, Fatoba PO (2013) Pollution loads and the ecological risk assessment of soil heavy metals around a mega cement factory in Southwest Nigeria. Pol J Environ Stud 22(2):487–493
no DOI — not checkedStatSoft Inc (2014) Poland. Statistica (data analysis software system), version 12.0. Tulsa
no DOI — not checkedSunlu U, Camarda D, Grassini L (2003) Environmental impacts of tourism. Local resources and global trades: environments and agriculture in the Mediterranean region Bari : CIHEAM options Méditerranéennes : Série a. Séminaires Méditerranéens 57:263–270
no DOI — not checkedWalter S (2001) Climate change and the skiing industry: impacts and potential responses paper written for the research seminar at the Arctic studies Programme. http://kaares.ulapland.fi/home/hkunta/jmoore/climateskiing.pdf (18.09.2017)
no DOI — not checkedWRB recommendations (2014) Soil resources reports 106. FAO UN, Rome
no DOI — not checkedZhong L, Liming L, Jiewen Y (2010) Assessment of Heavy Metals Contamination of Paddy Soil in Xiangyin County, China. Symposium 4.1.2 Management and protection of receiving environments, 19th World Congress of Soil Science, Soil Solutions for a Changing World 191–6 August 2010, Brisbane, Australia, pp 17–20
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