Skatulla, U., and E. Feicht. 1992. Studies on the flight behaviour of Pityogenes chalcographus L (Col, Scolytidae) and of some other insect species in connection with pheromone traps by aid of a new electronic instrument (In German). Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz 65:4-7.