Sun, Zhaohong. “Multiple and Least Energy Sign-Changing Solutions for Schrodinger-Poisson Equations in R3 With Restraint”. JOURNAL OF ADVANCES IN PHYSICS 13, no. 3 (March 29, 2017): 4763–4778. Accessed December 22, 2024. https://rajpub.com/index.php/jap/article/view/5938.