Affine lines on logarithmic Q-homology planes. R.V. Gurjar; M. Miyanishi — 1992 Mathematische Annalen
Some results on the topology of varieties dominated by Cn. R.R. Simha; R.V. Gurjar — 1992 Mathematische Zeitschrift
The fundamental group at infinity of affine surfaces. R.V. Gurjar; A.R. Shastri — 1984 Commentarii mathematici Helvetici
On the fundamental groups of some open rational surfaces. R.V. Gurjar; D.-Q. Zhang — 1996 Mathematische Annalen