6Jamart J.Pneumatosis cystoides intestinalis.A statistical study of 919 cases.Acta Hepatogastroenterol,1979,26:419-422.
7Boerner RM,Fried DB,Warshauer DM,et al.Pneumatosis intestinalis:two case reports and a retrospective review of the literature from 1985 to 1995.Dig Dis Sci,1996,41:2272-2285.
8Gagliardi G,Thompson IW,Hershman MJ,et al.Pneumatosis coli:a proposed pathogenesis based on study of 25 cases and review of the literature.Int J Colorectal Dis,1996,11:111-118.