L. Hasan; P. Vögeli; S. Neuenschwander; P. Stoll; E. Meijerink; C. Stricker; H. Jörg; G. Stranzinger. (1999). The L-gulono-gamma-lactone oxidase gene (<em>GULO</em>) which is a candidate for vitamin C deficiency in pigs maps to chromosome 14 . , 30(4), 309–312.
doi:10.1046/j.1365-2052.1999.00481.x
