1. Gartner LP, Hiatt JL, Strum JM (2003) Board review series. Cell biology and histology, 4th edn. Lippincott Williams & Wilkins, Philadelphia
2. Sanders KM, Don Koh S, Ward SM (2012) Organization and electrophysiology of interstitial cells of Cajal and smooth muscle cells in the gastrointestinal tract. In: Johnson L, Ghishan F, Kaunitz J, Merchant J, Said H, Wood J (eds) Physiology of the gastrointestinal tract. Elsevier, San Diego
3. Mittal RK (ed) (2011) Motor function of the pharynx, esophagus, and its sphincters. Integrated systems physiology: from molecule to function to disease. Morgan & Claypool Life Sciences, San Rafael
4. Sundler F (2004) GI tract, general anatomy (cells). In: Martini Luciano (ed) Encyclopedia of endocrine diseases. Elsevier, San Diego
5. Piccolino M, Bresadola M (2002) Drawing a spark from darkness: John Walsh and electric fish. Endeavour 26(1):19–26