Laser induced damage due to scratches in the surface of nonlinear optical crystals KH2PO4 (KDP)Dexing Zhu, Yaguo Li, Qinghua Zhang, Jian Wang and Qiao XuJ. Eur. Opt. Soc.-Rapid Publ., 13 1 (2017) 33DOI: https://doi.org/10.1186/s41476-017-0062-8