Media type: E-Book Title: Hypoellipticity and Eigenvalue Asymptotics Contributor: Rockland, Charles imprint: Springer Berlin Heidelberg, 1975 Published in: Lecture Notes in Mathematics Extent: Language: Not determined DOI: 10.1007/bfb0096096 ISSN: 0075-8434; 1617-9692 Origination: Footnote: