DROBNÁ, Jarmila a
Vladimír PTÁČEK. Experience in using bumblebees as pollinators in the regeneration of the genetic resources of some farage legumes.
Journal of Apicultural Science. RIPF, Apic. Div., Pulawy, Poland: Apicult. Res. Assoc., 2003, roč. 47, č. 1, s. 31-36. ISSN 1643-4439.