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The life and work of Prof. Dr. Yu. A. PESENKO (1944-2007) are discussed. He was a renowned Russian hymenopterologist, world-class specialist in bees of the family Halictidae. In 1997-1999 he was also employed as a visiting professor at the Institute of Biology and Environmental Protection, Pedagogical University of Bydgoszcz.
Professor Mirosława DYLEWSKA, a zoologist-entomologist and specialist in apiology, died in Kielce on 18 June 2007 at the age of 80. She worked at the Institute of Animal Systematics and Evolution of the Polish Academy of Sciences in Kraków. She published 80 papers on such fields of zoology as animal psychology, faunistics, taxonomy and phylogeny. In 1993 she founded the Section of Hymenopterology...
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