1. Akabayashi TW, Yamamoto M, Hirai Y, Yoshino Y: Absorption and availability of iron peptide in pregnant sows. Bull. Nippon vet. zootech. Coll. 1989, 38, 93–105.
2. Ashmead HD: Comparative intestinal absorption and subsequent metabolism of metal amino acid chelates and inorganic metal salts. In: Ashmead HD (author) The roles of amino acid chelates in animal nutrition. Noyes Publications. Park Ridge, New Jersey. 1993,47–75.
3. Ashmead HD: The role of iron amino acid chelate in pig performance. In: Ashmead HD The roles of amino acid chelates in animal nutrition. Noyes Publications. Park Ridge, New Jersey. 1993,207–230.
4. Bille N, Nielsen NC, Larsen JL, Svendsen J: Preweaning mortality in pigs. 2. The perinatal period. Nord. Vet.-Med. 1974,26, 294–313.
5. Bollwahn W, Vaske T, Rojas M, Wenz I: The haemat-opoiesis of newborn piglets and the effect of iron dextran (®Myofer). Blue Book Vet. Prof. 22,152–162.