Birkofer, Leonhard Max Planck Institute for Medical Research, Max Planck Society;
Storch, Ingeborg Max Planck Institute for Medical Research, Max Planck Society;
http://onlinelibrary.wiley.com/doi/10.1002/cber.19540870422/epdf (Any fulltext)
https://dx.doi.org/10.1002/cber.19540870422 (Any fulltext)
Birkofer, L., & Storch, I. (1954). β-Aminosäuren, IV. Mitteil.: β-Methionin und β-Äthionin. Chemische Berichte, 87(4), 571-577. doi:10.1002/cber.19540870422.