Reference

Alexander Georgewitsch Lebedev (1933): A contribution to the knowledge of the fauna and ecology of insect pol-linator of plants. I. The bees of the environs of Kiev. [Uk; 35 refs. Date: 29.XI.1933]. – Zbirnik Prats Sekt. Nazem. Tvarin (Kiev) – 1: 13 - 50.