1. Darvelid AW, Linde-Forsberg C: Dystocia in the bitch: A retrospective study of 182 cases. Journal of Small Animal Practice. 1994, 35: 402-407.
2. Gaudet DA: Retrospective study of 128 cases of canine dystocia. Journal of the American Animal Hospital Association. 1985, 21 (6): 813-818.
3. Eneroth A, Linde-Forsberg C, Uhlhorn M, Hall M: Radiographic pelvimetry for assessment of dystocia in bitches: a clinical study in two terrier breeds. Journal of Small Animal Practice. 1999, 40: 257-264.
4. Eneroth A, Uhlhorn M, Swensson L, Linde-Forsberg C, Hall M: Valpningsproblem hos fransk bulldogg, skotsk terrier & bostonterrier (Dystocia in the French Bulldog, Scottish terrier and Boston terrier). Hundsport. 2000, 112 (9): 38-41.
5. Gill MA: Perinatal and late neonatal mortality in the dog. PhD thesis. 2002, University of Sydney