Compact Hermitean Manifolds of Constant Holomorphic Sectional Curvature. Andrew Balas — 1985 Mathematische Zeitschrift
On the Sum of the Hermitian Scalar Curvatures of a Compact Hermitian Manifold. Andrew Balas — 1987 Mathematische Zeitschrift
Any Hermitian Metric of Constant Non-Positive (Hermitian) Holomorphic Sectional Curvature on a Compact Complex Surface is Kähler. Paul Gauduchon; Andrew Balas — 1985 Mathematische Zeitschrift