Prakash M, Geetha D, Lydia Caroline M. Crystal growth, structural, optical, spectral and thermal studies of tris(l-phenylalanine)l-phenylalaninium nitrate: A new organic nonlinear optical material. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 2011 Oct;81(1):48–52. doi: 10.1016/j.saa.2011.05.039.
Crystal growth, structural, optical, spectral and thermal studies of tris(l-phenylalanine)l-phenylalaninium nitrate: A new organic nonlinear optical material