Ziegler, D.; Billia, E.M.E. 2013. RHINOCEROTOIDEA Gray, 1825 (= Rhinocerotoidea Gill, 1872) – Bibliography of Selected Papers/Bibliografya/Références Bibliographiques/Bibliografía/Riferimenti Bibliografici – Addenda 2013. Studii si cercetari (s. Geology-Geography), Complexul Muzeal Bistrita-Nasaud (Natural Sciences Section), Bistrita; 18: 13-35.
Rookmaaker, L.C.; Rhino Resource Center; Ziegler, D.; Monson, J.; Strien, W. van; Billia, E.M.E. 2013. New literature in the Rhino Resource Center. Electronic Newsletter of the Rhino Resource Center no. 30 (February): 1-20.
Rookmaaker, L.C.; Rhino Resource Center; Ziegler, D.; Monson, J.; Strien, W. van; Billia, E.M.E. 2013. New literature in the Rhino Resource Center. Electronic Newsletter of the Rhino Resource Center no. 31 (May): 1-22.
Rookmaaker, L.C.; Rhino Resource Center; Ziegler, D.; Monson, J.; Strien, W. van; Billia, E.M.E. 2013. New literature in the Rhino Resource Center. Electronic Newsletter of the Rhino Resource Center no. 32 (August): 1-15.
Ziegler, D.; Billia, E.M.E. 2012. RHINOCEROTOIDEA Gray, 1825 (= Rhinocerotoidea Gill, 1872). Bibliography of Selected Papers – Références Bibliographiques – Bibliografía – Bibliografya – Riferimenti Bibliografici – Addenda 2012. Studii si cercetari (s. Geology-Geography), Complexul Muzeal Bistrita-Nasaud, Natural Sciences Section, Bistrita; 17: 15-50..
Ziegler, D.; Billia, E.M.E. 2011. RHINOCEROTOIDEA Gray, 1825 (= Rhinocerotoidea Gill, 1872). Bibliography of Selected Papers – Références Bibliographiques – Bibliografía – Bibliografya – Riferimenti Bibliografici – Addenda 2011. Studii si cercetari (Geology-Geography), Bistrita; 16: 7-55..






