(en) M. Promerová, L. S. Andersson, R. Juras et M. C. T. Penedo, «Worldwide frequency distribution of the ‘Gait keeper’ mutation in the DMRT3 gene», Animal Genetics, vol.45, no2, , p.274–282 (ISSN1365-2052, DOI10.1111/age.12120, lire en ligne, consulté le ).
DAD-IS. (en) «Lewitzer / Germany (Horse)», Domestic Animal Diversity Information System of the Food and Agriculture Organization of the United Nations (DAD-IS)
(en) M. Promerová, L. S. Andersson, R. Juras et M. C. T. Penedo, «Worldwide frequency distribution of the ‘Gait keeper’ mutation in the DMRT3 gene», Animal Genetics, vol.45, no2, , p.274–282 (ISSN1365-2052, DOI10.1111/age.12120, lire en ligne, consulté le ).
Porter et al. 2016, p.482. [Porter et al. 2016] (en) Valerie Porter, Lawrence Alderson, Stephen J. G. Hall et Dan Phillip Sponenberg, Mason's World Encyclopedia of Livestock Breeds and Breeding, CAB International, , 6eéd., 1 107p. (ISBN1-84593-466-0, OCLC948839453), «Lewitzer», p.482.
(en) M. Promerová, L. S. Andersson, R. Juras et M. C. T. Penedo, «Worldwide frequency distribution of the ‘Gait keeper’ mutation in the DMRT3 gene», Animal Genetics, vol.45, no2, , p.274–282 (ISSN1365-2052, DOI10.1111/age.12120, lire en ligne, consulté le ).
Porter et al. 2016, p.482. [Porter et al. 2016] (en) Valerie Porter, Lawrence Alderson, Stephen J. G. Hall et Dan Phillip Sponenberg, Mason's World Encyclopedia of Livestock Breeds and Breeding, CAB International, , 6eéd., 1 107p. (ISBN1-84593-466-0, OCLC948839453), «Lewitzer», p.482.