Surjectivity of the Period Map of K 3 Surfaces of Degree 2. Eiji Horikawa — 1977 Mathematische Annalen
Algebraic Surfaces of General Type with Small c... . III. Eiji Horikawa — 1978 Inventiones mathematicae
Algebraic Surfaces of General Type with Small ... . II. Eiji Horikawa — 1976 Inventiones mathematicae