1930/12/01 by Eduard Helly · 2 citations
Mathematics · #Advanced Differential Equations and Dynamical Systems #advanced mathematical theories
paper · doi:10.1007/bf01696777
crossref issued 1930/12/01 · crossref published 1930/12/01 · crossref published-print 1930/12/01 · openalex publication_date 1930/12/01 · crossref created 2005/05/15 · crossref deposited 2020/04/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28 · crossref indexed 2026/07/31