1. Epidural and spinal anaesthesia;CAMPOY, L.,2004
2. Evaluation of intraperitoneal and incisional lidocaine or bupivacaine for analgesia following ovariohysterectomy in the dog. Veterinary Anaesthesia and Analgesia 31;CARPENTER, R.E.; WILSON, D.V.; EVANS, A.T.;Veterinary Surgery; Comparison of intra-articular and epidural morphine for analgesia following stifle arthrotomy in dogs,2004
3. Handbook of Veterinary Pain Management;reading GAYNOR, Further; S., J.; MUIR, W.W.,2002
4. Lumb & Jones’ Veterinary Anaesthesia;Philadelphia, W.B.Saunders T.H.U.R.M.O.N.; C., J.; TRANQUILLI, W.J.; BENSON, G.J.,1996