Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Pfeffer, A. 1940b. Notulae Ipidiologicae II. Symbolae ad cognitionem generis Pityophthorus Eichh. Sbornik Faunistickych Praci Entomologickeho Oddeleni Narodniho Museo Museav Praze 18:107-127.