February 01, 1979 article Open access An Algebraic Surface with K Ample, (K 2 ) = 9, p g = q = 0 American Journal of Mathematics DOI: 10.2307/2373947 Full text (OA) OpenAlex Authors 0 Author list not loaded yet. Cited by 1 stored of 151 Search Sort Most cited Newest Oldest Patent citations Title Any typearticle review book-chapter conference-paper preprint dissertation book dataset other Any fieldAgricultural and Biological Sciences Arts and Humanities Biochemistry, Genetics and Molecular Biology Business, Management and Accounting Chemical Engineering Chemistry Computer Science Decision Sciences Dentistry Earth and Planetary Sciences Economics, Econometrics and Finance Energy Engineering Environmental Science Health Professions Immunology and Microbiology Materials Science Mathematics Medicine Neuroscience Nursing Pharmacology, Toxicology and Pharmaceutics Physics and Astronomy Psychology Social Sciences Veterinary Open access On Ramanujan bigraphs and general Ramanujan graphs 2026 Comptes Rendus Mathématique article Mathematics Finite Group Theory Research Open access 0 citations 1 result References 0