An improvement of a saddle point theorem and some of its applications (JNCA)
	Volume 22, Number 11, 2433-2439, 2021 An improvement of a saddle point theorem and some of its applications Biagio Ricceri  Download   ONLINE SUBSCRIPTION (Library Only) PDF   PDF   Open Access (Free) HTML   HTML                      For author            Copyright © 2021 Yokohama Publishers