Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Chorbadzhievo, P. 1924a. Belezhki vorkhu vzhtreshnite paraziti na vrednite nasekomi i tekhnoto izpolzuvane vo praktikata. Sofiia. Sp. na Zemled. Izpitatelni instituti vo Bulgariia. God. 3 kn. 1, str. 86.