Petrographic composition of lignite from the lake Somerville Spillway (East-Central Texas) / Sandra PAWELEC, Barbara BIELOWICZ // W: WMESS 2017 [Dokument elektroniczny] : World Multidisciplinary Earth Sciences Symposium : 11–15 September, 2017, Prague, Czech Republic : abstract collection book. — Wersja do Windows. — Dane tekstowe. — [Czech Republic : s. n.], [2017]. — 1 dysk optyczny. — S. [128]. — Wymagania systemowe: Adobe Reader

Petrographic composition of lignite from the Lake Somerville Spillway (East-central Texas) / Sandra PAWELEC, Barbara BIELOWICZ // IOP Conference Series: Earth and Environmental Science ; ISSN 1755-1307. — 2017 vol. 95 art. no. 022028, s. 1–12. — Bibliogr. s. 11–12, Abstr.. — Publikacja dostępna online od: 2017-12-21. — WMESS 2017 : World Multidisciplinary Earth Sciences Symposium : 11–15 September 2017, Prague, Czech Republic. — tekst: https://goo.gl/Mzsc5K

Sulphur in Polish lignite deposits / Barbara BIELOWICZ, Sandra PAWELEC, Natalia Maciejończyk // W: SGEM 2017 : 17\textsuperscript{th} international multidisciplinary scientific geoconference : science and technologies in geology, exploration and mining : 29 June–5 July, 2017, Albena, Bulgaria : conference proceedings. Vol. 17 iss. 11, Geology mineral processing. — Sofia : STEF92 Technology Ltd., cop. 2017. — (International Multidisciplinary Scientific GeoConference SGEM ; ISSN 1314-2704). — ISBN: 978-619-7105-98-8. — S. 557–564. — Bibliogr. s. 563–564, Abstr.