G, S. K., & M, J. (2023). Development and Evaluation of an Efficient Second Order Non-Linear Optical Single Crystal – 2-(3-Aminopyridinium-1-yl)-3-Carboxy-Proponate Monohydrate. Photonics Letters of Poland, 15(3), 48–50. https://doi.org/10.4302/plp.v15i3.1196