PERJU, T. and MOLDOVAN, I. 1989. Seminifagous insects growing on inflorescences of Centaurea species (Asteraceae). Notulae Botanicae Horti Agrobotanici Cluj-Napoca. 19, 1 (Aug. 1989), 85–90. DOI:https://doi.org/10.15835/nbha191297.