Assessing the spatial distribution and sources of heavy metal pollution in the snow cover: A case study from Pavlodar, Northeastern Kazakhstan - Alina Faurat; Dinara Yessimova; Gulmira Satybaldiyeva; Askhat Kuatbayev; Aizhan Utarbayeva; Ainagul Kaliyeva; Kairat Akhmetov; Shujaul Mulk Khan; Zeeshan Ahmad; Seilkhan Rakhmanov (PLoS ONE, 2025)