Chen, Zhijie, Chang-Shou Lin, and Wenming Zou. 2016. “Infinitely Many Sign-Changing and Semi-Nodal Solutions for a Nonlinear Schrödinger System ”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 15 (special):859-97. https://doi.org/10.2422/2036-2145.201401_002.