- What is Brownian motion on a noncommutative manifold ?, talk at the KBS Fest at the Indian Statistical Institute in Bangalore, India, December 12-14, 2019.
- On conditionally positive functions and functionals, talk at the Workshop 15w5086 : Quantum Markov Semigroups in Analysis, Physics and Probability, Oaxaca, Mexico, August 23 - 28, 2015.
- Quantenstochastik : Wie Gott würfelt, fellow lecture at the Alfried Krupp Wissenschaftskolleg Greifswald, April 28, 2014.
- On square roots of Haar states, talk at the 2009 NIMS Hot Topic Workshop on Infinite Dimensional Analysis and Related Topics, Hannam University, June 22, 2009.