LI*, JI-TAI, et al. “Synthesis of 1,5-Diaryl-3-Arylethenyl-2-Pyrazolines Under Ultrasound Irradiation”. Asian Journal of Chemistry, vol. 22, no. 1, Jan. 2024, pp. 589-92, https://asianpubs.org/index.php/ajchem/article/view/16681.