Holovatiuk, V. M., Bezugly, Y. V., & Kashkovsky, V. I. (2014). Synthesis of new 4,4-spirocycloalkenic 1,2-diphenylpyrazolidine-3,5-dione derivatives by ring-closing metathesis reactions. Journal of Organic and Pharmaceutical Chemistry, 12(3(47), 33–37. https://doi.org/10.24959/ophcj.14.803