Литература(eng)

Peter Collier "A Beginner's Guide To Differential Forms"
Reyer Sjamaar "Manifolds and Differential Forms" (171 pages)
Nigel Hitchin "DIFFERENTIABLE MANIFOLDS" (94 pages])
Robbin, Salamon, Madison "INTRODUCTION TO DIFFERENTIAL GEOMETRY" (439 pages)
Visual Differential Geometry and Forms_ A Mathematical Drama in Five Acts by Tristan Needham