Effect of addition of fly ash on properties of light ceramic proppants : [abstract] / Katarzyna GASEK, Marek GRANDYS, Janusz PARTYKA // W: EYEC monograph : 5\textsuperscript{th} European Young Engineers Conference : April 20–22\textsuperscript{nd} 2016, Warsaw / ed. Michał Wojasiński, Bartosz Nowak ; Scientific Club of Chemical and Process Engineering. Faculty of Chemical and Process Engineering. Warsaw University of Technology. Foundation of Young Science. — Warsaw : Faculty of Chemical and Process Engineering, Warsaw University of Technology, cop. 2016. — ISBN: 978-83-936575-2-0. — S. 148