Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Chorbadzhievo, P. 1925d. Po-vazhnite vredni nasekomi za gorskata dorvesha rastitelnost'vo Bulgariia. Sofiia. Sved. po zemeledelieto-God. 6. br. 1-3, str. 56-57.