Volume 2, Issue 2 Svetlin Georgiev Georgiev Positive periodic solutions for the nonlinear wave equation Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Svetlin Georgiev Georgiev Find more articles with the same keywords nonlinear wave equation periodic solutions Find more articles with the same subject classes 35L05 35L20 35L40