| Type | Author(s) | Title | Other Titles | Citation | Citation(alt) | Issue Date |
| bulletin (article) | Ishikawa, G. | 1995年度談話会・特別講習アブストラクト集 Colloquium Lectures 北海道大学理学部数学教室 | - | Hokkaido University technical report series in mathematics | 北海道大学数学講究録 | 1-Jan-1996 |
| bulletin (article) | Hayashi, M.; Ishikawa, G. | 2002年度談話会・特別講演アブストラクト集 Colloquium Lectures 北海道大学理学部数学教室 | - | Hokkaido University technical report series in mathematics | 北海道大学数学講究録 | 1-Jan-2003 |
| bulletin (article) | Ishikawa, G.; Machida, Y.; Takahashi, M. | The asymmetry on singularities of tangent surfaces in contact-cone Legendre-null duality | - | Hokkaido University Preprint Series in Mathematics | - | 12-Jan-2011 |
| bulletin (article) | Ishikawa, G. | Classifying singular Legendre curves by contactomorphisms | - | Hokkaido University Preprint Series in Mathematics | - | Oct-2002 |
| bulletin (article) | Ishikawa, G. | Determinacy, transversality and Lagrange stability | - | Hokkaido University Preprint Series in Mathematics | - | 1-Oct-1998 |
| bulletin (article) | Ishikawa, G. | Developable hypersurfaces and homogeneous spaces in a real projective space | - | Hokkaido University Preprint Series in Mathematics | - | 1-Feb-1999 |
| bulletin (article) | Davydov, A. A; Ishikawa, G.; Izumiya, S.; Sun, W.-Z | Generic singularities of implicit systems of first order differential equations on the plane | - | Hokkaido University Preprint Series in Mathematics | - | Feb-2003 |
| bulletin (article) | Ishikawa, G.; Ozawa, T. | The genus of a connected compact real algebraic surface in the affine three space | - | Hokkaido University Preprint Series in Mathematics | - | Feb-1993 |
| bulletin (article) | Ishikawa, G.; Machida, Yoshinori; Takahashi, Masatomo | Geometry of D_4 conformal triality and singularities of tangent surfaces | - | Hokkaido University Preprint Series in Mathematics | - | 25-Mar-2014 |
| bulletin (article) | Bogaevski, I. A; Ishikawa, G. | Lagrange mappings of the first open Whitney umbrella | - | Hokkaido University Preprint Series in Mathematics | - | 1-May-2000 |
| bulletin (article) | Ishikawa, G. | Perturbations of Caustics and fronts | - | Hokkaido University Preprint Series in Mathematics | - | Oct-2002 |
| bulletin (article) | Ishikawa, G. | A relative transversality theorem and its applications | - | Hokkaido University Preprint Series in Mathematics | - | 1-Apr-1997 |
| bulletin (article) | Ishikawa, G. | Singularities of Developable Surfaces | - | Hokkaido University Preprint Series in Mathematics | - | 1-Feb-1999 |
| bulletin (article) | Ishikawa, G.; Morimoto, T. | Solution surfaces of Monge-Ampre equations | - | Hokkaido University Preprint Series in Mathematics | - | 1-Apr-1997 |
| bulletin (article) | Ishikawa, G. | Topological classification of the tangent developables of space curves | - | Hokkaido University Preprint Series in Mathematics | - | 1-Jul-1996 |
| bulletin (article) | Ishikawa, G. | Topology of plane trigonometric curves and the strangeness of plane curves derived from real pseudo-line arrangements | - | Hokkaido University Preprint Series in Mathematics | - | 1-Nov-1996 |
| bulletin (article) | Ishikawa, G.; Izumiya, S.; Watanabe, K. | Vector fields near a generic submanifold | - | Hokkaido University Preprint Series in Mathematics | - | Oct-1991 |
| bulletin (article) | Ishikawa, G.; Izumiya, S.; Suwa, T. | 「特異点論とその応用」研究集会報告集 | - | Hokkaido University technical report series in mathematics | 北海道大学数学講究録 | 1-Jan-1989 |
