Authors
Paweł Węgrzynowicz
Research Institute of Horticulture, Apiculture Division, Puławy, Poland
Dariusz Gerula
Research Institute of Horticulture, Apiculture Division, Puławy, Poland
Adam Tofilski
University of Agriculture, Department of Pomology and Apiculture, Kraków, Poland
Beata Panasiuk
Research Institute of Horticulture, Apiculture Division, Puławy, Poland
Małgorzata Bieńkowska
Research Institute of Horticulture, Apiculture Division, Puławy, Poland