1. K. T. Chen, Pairs of maps into complex projective space, Amer. J. Math., supplement (1981), 51–61.
2. K.T. Chen, On the Hopf index theorem and Hopf invariants, Bull. Amer. Math. Soc. 5 (1981), 67–69.
3. S. S. Chern, “Selected Papers,” Springer-Verlag, Berlin/Heidelberg/New York, 1978.
4. M. Cornalba and P. Griffiths, Analytic cycles and vector bundles on noncompact algebraic varieties, Invent. Math. 28 (1975), 1–106.
5. P. Griffiths, Hermitian differential geometry, Chern classes, and positive vector bundles, “Global Analytis, Papers in Honor of K. Kodaira,” pp. 185–251. Univ. of Tokyo Press, Tokyo, and Princeton Univ. Press, Princeton, N. J., 1969.