Vaz FM, van Gool S, Ofman R, Ijlst L, Wanders RJ (setembro de 1998). «Carnitine biosynthesis: identification of the cDNA encoding human gamma-butyrobetaine hydroxylase». Biochemical and Biophysical Research Communications. 250 (2): 506–10. PMID9753662. doi:10.1006/bbrc.1998.9343
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Vaz FM, van Gool S, Ofman R, Ijlst L, Wanders RJ (setembro de 1998). «Carnitine biosynthesis: identification of the cDNA encoding human gamma-butyrobetaine hydroxylase». Biochemical and Biophysical Research Communications. 250 (2): 506–10. PMID9753662. doi:10.1006/bbrc.1998.9343