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Ziegler, Thomas, David, Patrick, Ziegler, Tim N., Pham, Cuong T., Nguyen, Truong Q. and Le, Minh D. (2018). Morphological and molecular review of Jacob's Mountain Stream Keelback Opisthotropis jacobi Angel & Bourret, 1933 (Squamata: Natricidae) with description of a sibling species from northern Vietnam. Zootaxa, 4374 (4). S. 476 - 497. AUCKLAND: MAGNOLIA PRESS. ISSN 1175-5334
Ziegler, Thomas, Ziegler, Tim N., Peusquens, Julia, David, Patrick, Vu, Thanh N., Pham, Cuong T., Nguyen, Truong Q. and Le, Minh D. (2017). Expanded morphological definition and molecular phylogenetic position of the Tam Dao mountain stream keelback Opisthotropis tamdaoensis (Squamata: Natricidae) from Vietnam. Rev. Suisse Zool., 124 (2). S. 377 - 390. GENEVA 6: MUSEUM HISTOIRE NATURELLE. ISSN 0035-418X