Cadmium, manganese, nickel and lead contents in surface sediments of the lower Ulla River and its estuary (northwest Spain) / R. Prego, M. J. Belzunce Segarra, E. HELIOS-RYBICKA, M. C. Barciela // Boletín Instituto Español de Oceanografía ; ISSN 0074-0195. — 1999 vol. 15 (1–4), s. 495–500. — Bibliogr. s. 500, Abstr.

Distribution and chemical forms of heavy metals in the flood 1997 sediments of the Upper and Middle Odra River and its tributaries, Poland — Verteilung und chemische Formen von Schwermetallen in den Flutsedimenten des Hochwassers 1997 der Oberen und Mittleren Oder und ihrer Nebenflüsse, Polen / E. HELIOS RYBICKA, M. STRZEBOŃSKA // Acta Hydrochimica et Hydrobiologica ; ISSN 0323-4320. — 1999 vol. 27 no. 5, s. 331–337. — Bibliogr. s. 337, Summ., Zsfassung. — Publikacja dostępna online od: 1999-11-22. — tekst: https://onlinelibrary-1wiley-1com-1r3ntz4h20133.wbg2.bg.agh.edu.pl/doi/epdf/10.1002/%28SICI%291521-401X%28199911%2927%3A5%3C331%3A%3AAID-AHEH331%3E3.0.CO%3B2-M

Experimental study on the formation of heavy metal sulphides using layer silicates: environmental aspects / E. HELIOS-RYBICKA, A. PIESTRZYŃSKI, S. Th. Schmidt // W: Natural microporous materials in environmental technology : [conference of the NATO advanced research workshop on the application of natural microporous materials in environmental technology : Smolenice, Slovakia, October 26–30, 1998 / ed. P. Misaelides [et al.]. — [Netherland] : Kluwer Academic Publishers, 1999. — (NATO ASI Series. Series E: Applied Sciences ; ISSN 1566-7103 ; vol. 362). — S. 137–146. — Bibliogr. s. 145–146, Abstr.

Sediment quality of the Rivers Oder and Vistula / E. HELIOS-RYBICKA, M. WARDAS, M. STRZEBOŃSKA // W: Sediment assessment in European River Basins : international symposium : 20–22 April 1999 in Berlin. — [Berlin : s. n.], [1999]. — S. [3]

Total and exchangeable concentrations of heavy metals in soils near Bytom, an area of Pb/Zn mining and smelting in Upper Silesia, Poland / Susanne M. Ullrich, Michael H. Ramsey, Edeltrauda HELIOS-RYBICKA // Applied Geochemistry ; ISSN 0883-2927. — 1999 vol. 14 no. 2, s. 187–196. — Bibliogr. s. 196