Analysis of the occurrence of elements and critical raw materials in ash from Polish lignite deposits / Barbara BIELOWICZ, Jacek MISIAK, Marian WAGNER // W: SEED 2017 : 2\textsuperscript{nd} international conference on the Sustainable Energy and Environment Development : Kraków, Poland, 14–17 November, 2017 : book of abstracts. — Krakow : Institute for Sustainable Energy, 2017. — ISBN: 978-83-944254-4-9. — S. 225

Critical elements in fly ash from the combustion of bituminous coal in major Polish power plants / Barbara BIELOWICZ, Dariusz BOTOR, Jacek MISIAK, Marian WAGNER // W: POL-VIET 2017 : 4\textsuperscript{th} international conference Scientific-research cooperation between Vietnam and Poland : 20–22 November 2017, Krakow, Poland : book of abstracts / ed. Jadwiga Jarzyna. — Kraków : Wydawnictwa AGH, 2017. — ISBN: 978-83-7464-752-0. — S. 35

The reactivity of Polish coal gasified in a carbon dioxide environment / BIELOWICZ Barbara, Jacek MISIAK, Karol Szymura, Wojciech Szulik // W: TSOP 2017 [Dokument elektroniczny] : annual meeting of the Society for Organic Petrology : September 21-27, 2017, Calgary, Alberta, Canada / Canadian Society for Coal Science and Organic Petrology. — [Calgary : s. n.], [2017]. — S. 65–66. — Wymagania systemowe: Adobe Reader. — Tryb dostępu: https://tsop2017.files.wordpress.com/2017/03/book-of-abstracts1.pdf [2017-10-30]