1. The involuntary nervous system;Gaskell,1920
2. Motor action of rectum and anal sphincters in continence and defaecation;Schuster,1968
3. Catecholamines;Parks,1967
4. The action of nicotine and catecholamines on the human internal anal sphincter;Friedmann;Am J Dig Dis,1968
5. An in vitro pharmacological investigation of the human internal anal sphincter;Burleigh;Naunyn Schmeidebergs Arch Pharmakol,1973