Reference health
PCA‐ and PMF‐based methodology for air pollution sources identification and apportionment
3/3 checkable references clean · checked 2026-07-23
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.
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The 3 checked references that resolve
resolves10.1080/00401706.1979.10489819
Lower Rank Approximation of Matrices by Least Squares With Any Choice of Weights
resolves10.1002/env.3170050203
Positive matrix factorization: A non‐negative factor model with optimal utilization of error estimates of data values
The 2 references without a DOI — listed, not checked
no DOI — not checkedReceptor Modeling for Air Quality Management
no DOI — not checkedPrincipal Component Analysis
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