Castro, Adailton N. De, et al. “Study of the Hyper-Rayleigh Scattering First Hyperpolarizability of a Chalcone Derivative in Various Solvent Media”. Photonics Letters of Poland, vol. 11, no. 4, Dec. 2019, pp. 96-98, doi:10.4302/plp.v11i4.892.