[1]
Heliövaara, K., Väisänen, R., Kemppi, E. and Lodenius, M. 1990. Heavy metal concentrations in males and females of three pine diprionids (Hymenoptera). Entomologica Fennica. 1, 3 (Sep. 1990), 175–179. DOI:https://doi.org/10.33338/ef.83479.