Findis.org: The Finnish Disease Database describes NKH.
NKH Parent Network: For parents with children with nonketotic hyperglycinemia (NKH), a rare and still uncurable metabolic disorder, founded in early 1996.
Nonketotic Hyperglycinemia: A short Wikipedia article on NKH.
Online Mendelian Inheritance in Man: Genetics and references for glycine encephalopathy, also called nonketotic hyperglycinemia.