Registered users receive a variety of benefits including the ability to customize email alerts, create favorite journals list, and save searches.
Please note that a Project Euclid web account does not automatically grant access to full-text content. An institutional or society member subscription is required to view non-Open Access content.
Contact customer_support@projecteuclid.org with any questions.
View Project Euclid Privacy Policy
Melvyn S. Berger "On periodic solutions of nonlinear hyperbolic equations and the calculus of variations," Bulletin of the American Mathematical Society, Bull. Amer. Math. Soc. 76(3), 633-637, (May 1970)
