It is argued that the existence of the new compounds of glycine recently reported by M.M. Khandpekar et al. (Optics Commun. 284(2011) 1583 and Optics Commun. 284(2011) 1578) is dubious. We argue that these compounds are not what the authors propose. In addition, two more similar cases are indicated. © 2011 Elsevier B.V.
Petrosyan, A. M., Ghazaryan, V. V., & Fleck, M. (2011, September 1). Comments on the papers recently published by M.M. Khandpekar et al. Optics Communications. https://doi.org/10.1016/j.optcom.2011.05.057