P.Selvarajan4, S. S. S. “Studies on Structural, Optical, Mechanical and Thermal Properties of Undoped and Urea-Doped L-Histidine Bromide(LHB) Single Crystals”. Recent Research in Science and Technology, vol. 3, no. 3, Mar. 2011, https://updatepublishing.com/journal/index.php/rrst/article/view/645.