| Differential geometry, Lie groups, and symmetric spaces, Acad S Helgason Press, London, 1978 | 13076* | 1978 |
| Groups and geometric analysis: integral geometry, invariant differential operators, and spherical functions S Helgason American Mathematical Society, 2022 | 3149 | 2022 |
| The radon transform S Helgason, S Helgason Birkhäuser, 1980 | 1916 | 1980 |
| Geometric analysis on symmetric spaces, Second Edition S Helgason Amer Mathematical Society, 2008 | 845* | 2008 |
| A duality for symmetric spaces with applications to group representations S Helgason Advances in Mathematics 5 (1), 1-154, 1970 | 440 | 1970 |
| Integral Geometry and Radon Transforms S Helgason Springer, 2011 | 428 | 2011 |
| The Radon transform on Euclidean spaces, compact two-point homogeneous spaces and Grassmann manifolds S Helgason | 378 | 1965 |
| Humoral immune parameters in Atlantic cod (Gadus morhua L.): I. The effects of environmental temperature B Magnadóttir, H Jónsdóttir, S Helgason, B Björnsson, TØ Jørgensen, ... Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular …, 1999 | 244 | 1999 |
| Differential operators on homogeneous spaces S Helgason | 209 | 1959 |
| Topics in harmonic analysis on homogeneous spaces S Helgason Boston: Birkhauser,, 1981 | 182 | 1981 |
| The surjectivity of invariant differential operators on symmetric spaces I S Helgason Annals of Mathematics 98 (3), 451-479, 1973 | 139 | 1973 |
| Eigenspaces of the Laplacian; integral representations and irreducibility S Helgason Journal of Functional Analysis 17 (3), 328-353, 1974 | 134 | 1974 |
| An analogue of the Paley-Wiener theorem for the Fourier transform on certain symmetric spaces S Helgason Mathematische Annalen 165 (4), 297-308, 1966 | 121 | 1966 |
| Humoral immune parameters in Atlantic cod (Gadus morhua L.): II. The effects of size and gender under different environmental conditions B Magnadóttir, H Jónsdóttir, S Helgason, B Björnsson, TØ Jørgensen, ... Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular …, 1999 | 118 | 1999 |
| Immune parameters of immunised cod (Gadus morhua L.) B Magnadóttir, H Jónsdóttir, S Helgason, B Björnsson, ST Solem, ... Fish & Shellfish Immunology 11 (1), 75-89, 2001 | 115 | 2001 |
| Fundamental solutions of invariant differential operators on symmetric spaces S Helgason American Journal of Mathematics 86 (3), 565-601, 1964 | 111 | 1964 |
| Groups and geometric analysis, volume 83 of Mathematical Surveys and Monographs S Helgason American Mathematical Society, Providence, RI 2, 2000 | 109 | 2000 |
| Atypical Aeromonas salmonicida infection in naturally and experimentally infected cod, Gadus morhua L. B Magnadóttir, SH Bambir, BK Gudmundsdóttir, L Pilström, S Helgason Journal of Fish Diseases 25 (10), 583-597, 2002 | 107 | 2002 |
| Multipliers of Banach algebras S Helgason Annals of Mathematics 64 (2), 240-254, 1956 | 102 | 1956 |
| A duality for symmetric spaces with applications to group representations, II. Differential equations and eigenspace representations S Helgason Advances in Mathematics 22 (2), 187-219, 1976 | 92 | 1976 |
