A taxonomic revision of inoperculate discomycetes described by J. Velenovský in the genus Helotium, preserved in National Museum, Prague. Mirko Svrček 1984 | volume 40 | issue 3-4 | pages 129–216 PDF
Neue mediterrane, eremishce und ostafrikanische Issid-taxone (Hom., Auchenorrhyncha). Jiří Dlabola 1984 | volume 40 | issue 3-4 | pages 217–243 PDF
