Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Alberto Cabada, José Ãngel Cid. On the sign of the Green s function associated to Hill s equation with an indefinite potential. Applied Mathematics and Computation, 205(1):303-308, 2008. [doi]