1. El-Sherif , S. Gomaa , A. A. Hemeida , I. A. The biology of potato tuberworm, Phtborimaea operculella Zeller (Lepidoptera, Gelechiidae). II Effect of relative humidity
2. Reaction of monovoltine butterflies to prolongation of day length. (In russian);Geyspitz;Entomologickoje Obozrenie,1953
3. Some features of the photoperiodic reaction of Dasychira pubibunda L. (Lepidoptera, Orgyiidae);Geyspitz;Ent. Rev.,1963
4. The biology of potato tuberworm, Phthorimaea operculella Zeller (Lepidoptera, Gelechiidae). I. Effect of larval diet;Gomaa;Z. ang. Ent.,1978