Waldmann, Herbert Abt. IV: Chemische Biologie, Max Planck Institute of Molecular Physiology, Max Planck Society;
Braun, P., Waldmann, H., Vogt, W., & Kunz, H. (1990). Selective enzymatic removal of protecting functions: Heptyl esters as carboxy protecting groups in peptide synthesis. Synlett, 1990: 1, pp. 105-107.