Burrington, J. D., & Wayne, E. R. (1974). Obstruction of the duodenum by the superior mesenteric artery — does it exist in children? Journal of Pediatric Surgery, 9(5), 733-741. doi:10.1016/0022-3468(74)90112-2  

            Notes: Report of 20 cases of SMAS in children.  5 were treated successfully with conservative treatment (one of whom later died of cancer) and 14 of whom underwent surgical treatment (one of whom had some ongoing symptoms).  Includes descriptions of diagnostic findings and anatomic structures observed in surgery. Link: http://www.jpedsurg.org/article/0022-3468(74)90112-2/abstract