Plain text, RIS, BibTex Journal Articles by J. Kroupa I. Matulková, I. Císařová, M. Fridrichová, R. Gyepes, P. Němec, J. Kroupa and I. Němec Inorganic Salts of N-phenylbiguanidium(1\mathplus)\textemdashNovel Family with Promising Representatives for Nonlinear Optics International Journal of Molecular Sciences 22(16), 2021 DOI BibTeX I. Němec, I. Matulková, W. Krumbe, L. Andersen, I. Císařová, J. Kroupa, P. Němec, L. Bohatý et al. Linear and nonlinear optical properties, pyroelectricity and vibrational spectroscopy of polar guanidinium hydrogen phosphite, GuH2PO3, and hydrogen selenite, GuHSeO3 Optical Materials 111, 2021 DOI BibTeX I. Němec, I. Matulková, P. Held, J. Kroupa, P. Němec, D. Li, L. Bohatý and P. Becker Crystal growth, crystal structure, vibrational spectroscopy, linear and nonlinear optical properties of guanidinium phosphates Optical Materials 69, 2017 DOI BibTeX