6Bednarski P M. Closed system delivery of halothare and isoflarane with a vaponzer in the anesthetic circle[J]. Veterinary Surgery, 1991,20(5):357-361.
7Bednarski R M. Vaporizer in circle for clelivery of isoflurane to dogs[J]. Journal of the American Veterinary Medical Association, 1993,202(6):943-948.
8Olson K N. Closed-circuit liquid injection isoflarane anesthesia in the horse[J]. Veterinary Surgery, 1993,22(1):73-78.
