EKFALCK, A; APPELGREN, LE; FUNKQUIST, B et. al 1990 Distribution of Labelled Cysteine and Methionine in the Matrix of the Stratum Medium of the Wall and in the Laminar Layer of the Equine Hoof Research article (Peer reviewed) DOI:10.1111/j.1439-0442.1990.tb00934.x