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
Alexander Nagel, Elias M. Stein, Stephen Wainger "Balls and metrics defined by vector fields I: Basic properties," Acta Mathematica, Acta Math. 155(none), 103-147, (1985)
