@article{paperid:1084963, author = {Sahebi, Ramezan}, title = {Comment on: “growth, spectroscopic studies, and third order non-linear optical analysis of an organic dicarboxylic acid based single crystal: urea oxalic acid” [Chin. J. Phys., 56 (2018) 1449–1466]}, journal = {Chinese Journal of Physics}, year = {2020}, volume = {66}, month = {August}, issn = {0577-9073}, pages = {109--111}, numpages = {2}, keywords = {Beer-lambert lawReflectance spectraRefractive index}, }