Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Sierpinski, Z. 1969a. Przydatnosc drzew pulapkowych do zwalczania szkodnikow wtornych sosny na terenach uprzemystowionych [Effectiveness of trap trees for control of secondary pests of pine in industrial areas] . Sylwan 113:51-54.