TY - DATA AU - Chaohao Gu AU - Marcel Berger AU - Robert L. Bryant TI - Differential Geometry and Differential Equations T2 - Lecture Notes in Mathematics SN - 9783540478836 PY - 1987/// CY - Heidelberg PB - Springer Berlin KW - Mathematics and Statistics UR - https://doi.org/10.1007/BFb0077675 ER -