- Beuchat, C, do Institute of Canine Biology. Breeding for the future. Disponível aqui

- Beuchat, C, do Institute of Canine Biology. Purebreed vx mixed breed. Disponível aqui

- Stronen AV  e cols. (2017). Genetic rescue of an endangered domestic animal through outcrossing with closely related breeds: a case  study of the Norwegian Lundehund. Disponível aqui

- Ennik I e cols. (2006). Suitability for field service in 4 breeds of guide dogs. Disponível aqui (um exemplo de heterose/vigor hibrido)