Growth and nonlinear optical studies of N-acetyl-L-cysteine crystal L. Guru Prasad, V. Krishnakumar and R. Nagalakshmi Eur. Phys. J. Appl. Phys., 57 1 (2012) 10201 Published online: 02 December 2011 DOI: 10.1051/epjap/2011110263