Jan Kisyński. Holomorphicity of semigroups of operators generated by sublaplacians on Lie groups. In Erhard Meister, Norbert Weck, and Wolfgang L. Wendland, Function Theoretic Methods for Partial Differential Equations. Proceedings of the International Symposium Held at Darmstadt, Germany, April 1215, 1976, volume 561 of Lecture Notes in Mathematics, pages 283–297. Springer Berlin-Heidelberg, 1976.

• Mathematical Reviews review by Yasuhiro Asoo (subscription required)
• Zentralblatt MATH entry

• electronic copy of the paper from SpringerLink (subscription required)