ENGHOFF H   1992

Dolichoiulus-a mostly Macaronesian multitude of millipedes. With the description of related new genus from Tenerife, Canary Islands (Diplopoda, Julida, Julidae)

Entomologica Scandinavica, Supplement No. 40, 158 S., mehrere SW Abb. u. Fotos, brosch., guter Zustand

ENGHOFF H   1982

The millipede genus Cylindroiulus on Madeira - an insular species swarm (Diplopoda, Julida: Julidae)

Entomologica Scandinavia, Supplement No. 18, 142 S., mit zahlr. Abb. im Text, brosch.