@Article{ authors = " Daniel Okupny, Ryszard K. Borówka, Anna Fortuniak, Julita Tomkowiak", title = "Skład chemiczny osadów organicznych ze stanowiska Koźmin Las", journal = "Acta Geographica Lodziensia", issue = "2014 / Numer 102", pages = "71 - 86" }

@Article{ authors = " Daniel Okupny, Olga Antczak-Orlewska, Dominik Pawłowski, Ryszard K. Borówka, Joanna Sławińska, Julita Tomkowiak, Paweł Osóch, Andrzej Bartczak, Anna Nierychlewska, Barbara Osóch, Marek Krąpiec, Witold Jucha, Piotr Kittel, Agata Sady-Bugajska, Szymon Spławski", title = "How Well Multi-Indicator Palaeoenvironmental Studies Meet the Needs of Research on Settlements : On the Example of the Early Medieval Settlements Complex in Szczecin : Methodological Problems and Evaluating Interpratation Value ", journal = "Acta Geographica Lodziensia", issue = "2022 / Numer 112", pages = "97 - 121" }

@Article{ authors = " Daniel Okupny, Anna Fortuniak, Julita Tomkowiak", title = "Cechy denudacji w regionie łódzkim w późnym vistulianie w świetle chemicznych badań osadów torfowiskowych", journal = "Acta Geographica Lodziensia", issue = "2013 / Numer 101", pages = "89 - 99" }

@Article{ authors = " Ryszard K. Borówka, Joanna Sławińska, Daniel Okupny, Pawel Osóch, Julita Tomkowiak", title = "Mercury in the Sediments of Selected Peatlands in Małopolska Region ", journal = "Acta Geographica Lodziensia", issue = "2022 / Numer 112", pages = "61 - 76" }

@Article{ authors = " Daniel Okupny, Ryszard Krzysztof Borówka, Bernard Cedro, Joanna Sławińska, Julita Tomkowiak, Adam Michczyński, Dorota Kozłowska, Krzysztof Kowalski, Krzysztof Siedlik", title = "Geochemistry of a Sedimentary Section at the Wąwelnica Archaeological Site, Szczecin Hills (Western Pomerania) ", journal = "Acta Geographica Lodziensia", issue = "2020 / Numer 110", pages = "169 - 186" }