Authors
Dariusz Teper
Research Institute of Horticulture, Apiculture Division in Puławy, Poland
Piotr Semkiw
Research Institute of Horticulture, Apiculture Division in Puławy, Poland
Piotr Skubida
Research Institute of Horticulture, Apiculture Division in Puławy, Poland
Mikołaj Borański
Research Institute of Horticulture, Apiculture Division in Puławy, Poland