@incollection{gledocs_11858_00-1735-0000-0001-33B3-D,
author = {Reitner, Joachim and Keupp, H.},
editor = {Reitner, Joachim},
title = {The fossil record of the Haplosclerid excavating sponge Aka de Laubenfels},
booktitle = {Fossil and recent spongesFossil and recent sponges},
year = {1991},
publisher = {Springer, Berlin [u.a.]},

note = { \url {http://hdl.handle.net/11858/00-1735-0000-0001-33B3-D}},
}