Authors
Mikołaj Borański
The National Institute of Horticultural Research, Apiculture Division in Puławy, Skierniewice, Poland
Kornelia Kucharska
Institute of Animal Science, Departament of Animal Environment Biology, Warsaw, Poland
Dariusz Teper
The National Institute of Horticultural Research, Apiculture Division in Puławy, Skierniewice, Poland