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 14 references without a DOI — listed, not checked
no DOI — not checkedKajak, Z., K. Kacprzak & R. Polkowski, 1965. Tubular bottom sampler. Ekol. pol. B 11: 159–165.
no DOI — not checkedKisielewski, J., 1981. Gastrotricha from raised and transitional peat bogs in Poland. Monogr. Fanny Pol. 11: 143 pp.
no DOI — not checkedNesteruk, T., 1987. Assessing the efficiency of three methods of extracting freshwater Gastrotricha from bottom silt. Acta hydrobiol. 29: 219–226.
no DOI — not checkedNesteruk, T., 1991. Vertical distribution of Gastrotricha in organic bottom sediment of inland water bodies. Acta hydrobiol. 33: 253–264.
no DOI — not checkedNesteruk, T., 1993. A comparison of values of freshwater Gastrotricha densities determinated by various methods. Acta hydrobiol. 35: 321–328.
no DOI — not checkedPrejs, K., 1977a. The littoral and profundal benthic nemathodes of lakes with different trophy. Ekol. pol. 25: 21–30.
no DOI — not checkedPrejs, K., 1977b. The species diversity, numbers and biomass of benthic nemathodes in central part of lakes with different trophy. Ekol. pol. 25: 31–44.
no DOI — not checkedPrejs, K. & K. Papinska, 1983. Ecological characteristics of lakes in north-eastern Poland versus their trophic gradient. XI. Meiobenthos and near-bottom meiofauna in 20 lakes. Ekol. pol. 31: 477–493.
no DOI — not checkedPreobrazenskaya, E. N., 1926. Rasprastranenye Gastrotricha v vodoemah Kosina i yego okrestnostey. Trudy kosin. biol. Stanc. 4: 3–14.
no DOI — not checkedRadwan, S. & Cz. Kowalczyk, 1979. Chemical compounds of three trophically different lakes of the Leczna-Wlodawa Lakeland. Ann. Univ. M. Curie-Sklodowska 34: 229–260.
no DOI — not checkedRudescu, L., 1967. Gastrotricha. Fauna Republ. Socialiste Romania 2: 1–289.
no DOI — not checkedStrayer, D., 1985. The benthic micrometazoans of Mirror Lake, New Hampshire. Arch. Hydrobiol. Supp. 72: 287–426.
no DOI — not checkedTretyakova, E., 1991. Lepidodermella spinifera — novyj vid gastrotrich (Gastrotricha) s promezutocnymi rodovymi priznakami. Biul. Moskw. O-va Ispytatelej Prirody 96: 79–85.
no DOI — not checkedTrojan, P., 1978. Ekologia ogolna. PWN. Warszawa, 419 pp.
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