1. Apostolov, V., Calderbank, D.M.J., Gauduchon, P., Tønnesen-Friedman, C.: Hamiltonian 2-forms in Kähler geometry, III. Extremal metrics and stability. Invent. Math. 173, 547–601 (2008)
2. Adv. Stud. Pure Math.;S. Bando,1987
3. Bourguignon, J.-P., Li, P., Yau, S.-T.: Upper bound for the first eigenvalue of algebraic submanifolds. Comment. Math. Helv. 69, 199–207 (1994)
4. Calabi, E.: Extremal Kähler metrics, seminar on differential geometry, pp. 259–290. Princeton Univ. Press, Princeton (1982)
5. Calabi, E.: Extremal Kähler metrics, II. In: Chavel, I., Farkas, H.M. (eds.) Differential Geometry and Complex Analysis. Springer, Berlin (1985)