Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Loewel, E. L., and M. Saure. 1961. Weitere Ursachen fur Zweigund Aststerben an Kirschbaumen [Further causes of twig and branch mortality of cherry trees] . Obstbauversring des Alten Landes Mitt. 16:183-185.