Mirchev, Plamen, Georgi Georgiev, and Georgi Tsankov. 2017. “Long-Term Studies on Egg Parasitoids of Pine Processionary Moth (Thaumetopoea Pityocampa) in a New Locality in Bulgaria”. Journal of the Entomological Research Society 19 (3):15-25. https://entomol.org/journal/index.php/JERS/article/view/1112.