3 literature references for Penares helleri (Schmidt, 1864):
| Author: |
Van Soest, R.W.M. |
| Year: |
2001 |
| Title: |
Porifera, in: Costello, M.J. et al. (Ed.) (2001). |
| Source: |
European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: |
| Author: |
Boury-Esnault, N.; Pansini, M.; Uriz, M.J. |
| Year: |
1994 |
| Title: |
Spongiaires bathyaux de la mer d’Alboran et du golfe ibéro-marocain. |
| Source: |
Mémoires du Muséum national d’Histoire naturelle 160: 1-174. |
| Author: |
Schmidt, O. |
| Year: |
1862 |
| Title: |
Die Spongien des adriatischen Meeres. |
| Source: |
(Wilhelm Engelmann: Leipzig): i-viii, 1-88, pls 1-7. |
