High-resolution solid-state NMR structure of Alanyl-Prolyl-Glycine,
A. B. Barnes, Andreas, L. B., Huber, M., Ramachandran, R., van der Wel, P. C. A., Veshtort, M., Griffin, R. G., and Mehta, M. A., ,
Journal of Magnetic Resonance, vol. 200, pp. 95–100, 2009.