Shamshev, I.V. 2020.

Notes on species of Empididae (Diptera) described by R. Frey from the Swedish Kamchatka Expedition 1920–1922

. Zootaxa. 4758, 3 (Mar. 2020), 532–548. DOI:https://doi.org/10.11646/zootaxa.4758.3.6.