Curvature forms for 2-manifolds

N. R. Wallach, F. W. Warner
1970 Proceedings of the American Mathematical Society  
A MS Subject Classifications. Primary 5372, 5345; Secondary 5325, 5732.
doi:10.1090/s0002-9939-1970-0262976-6 fatcat:h5gn3h4yzzdr5hsiioq46s675a