| Differential geometry, Lie groups, and symmetric spaces, Acad S Helgason Press, London, 1978 | 8664* | 1978 |
| Lie groups and symmetric spaces. S Helgason pp 1-71 of Battelle Rencontres./DeWitt, Cecile M.(ed.). New York WA Benjamin …, 1968 | 8588* | 1968 |
| Differential geometry, Lie groups and symmetric spaces S Helgason Bull. Amer. Math. Soc 2, 468-476, 1980 | 8581 | 1980 |
| Differential geometry, Lie groups, and symmetric spaces S Helgason Academic press, 1979 | 8581 | 1979 |
| Differential geometry and symmetric spaces S Helgason American Mathematical Soc., 2001 | 4513* | 2001 |
| Groups & geometric analysis: Radon transforms, invariant differential operators and spherical functions S Helgason Academic press, 1984 | 3128* | 1984 |
| Natural operations in differential geometry I Kolár, J Slovák, PW Michor | 2250* | 1999 |
| The radon transform S Helgason, S Helgason Birkhäuser, 1999 | 1902* | 1999 |
| The convenient setting of global analysis A Kriegl, PW Michor American Mathematical Soc., 1997 | 1591 | 1997 |
| Notes on differential geometry NJ Hicks van Nostrand, 1965 | 995 | 1965 |
| Geometric analysis on symmetric spaces S Helgason Providence, RI, 1994 | 832* | 1994 |
| Parabolic Geometries: Background and general theory A Cap, J Slovák American Mathematical Soc., 2009 | 620* | 2009 |
| Riemannian geometries on spaces of plane curves PW Michor, D Mumford arXiv preprint math/0312384, 2003 | 539* | 2003 |
| Topics in differential geometry PW Michor American Mathematical Soc., 2008 | 491 | 2008 |
| Manifolds of differentiable maps P Michor Differential Topology, 117-127, 2010 | 490 | 2010 |
| Manifolds of differentiable mappings PW Michor Birkhauser, 1980 | 490* | 1980 |
| A duality for symmetric spaces with applications to group representations S Helgason Advances in Mathematics 5 (1), 1-154, 1970 | 436 | 1970 |
| Integral geometry and Radon transforms S Helgason Springer Science & Business Media, 2010 | 389 | 2010 |
| The Radon transform on Euclidean spaces, compact two-point homogeneous spaces and Grassmann manifolds S Helgason Acta Mathematica 113 (1), 153-180, 1965 | 373 | 1965 |
| Introduction to algebraic curves P Griffiths, S Helgason American Mathematical Soc., 1989 | 304 | 1989 |