- (1990, April) Kinematics of vorticity from a global viewpoint. School of Aerospace Engineering, Politecnico di Torino.
- (1990, November) Topological equivalence classes under the Euler equations. DAMTP, University of Cambridge.
- (1991, April) Geometric and topological aspects of vortex dynamics. Associazione per lo Sviluppo Scientifico e Tecnologico del Piemonte (ASP), Villa Gualino, Torino.
- (1991, September) Torus knot solutions and global invariants under LIA. Institute for Theoretical Physics, University of California at Santa Barbara.
- (1992, March) Killing fields as soliton generators. School of Mathematics, Institute for Advanced Study, Princeton.
- (1992, May) Solitons on vortex filaments. DAMTP, University of Cambridge.
- (1992, May) The helicity of a knotted magnetic tube. MHD '92 Meeting. Department of Mathematics, University of Glasgow.
- (1992, November) The helicity and the “elastic energy” of a knotted flux tube via the Calugareanu invariant. Isaac Newton Institute for Mathematical Sciences, Cambridge.
- (1993, May) Geometric and topological properties of knotted magnetic flux tubes. Department of Mathematics, University College London.
- (1993, May) Geometric approach to one-dimensional solitons. Department of Physics, University of Torino.
- (1993, June) Topological and mechanical aspects associated with magnetic flux tubes. Theory Division, JET, Abingdon, Oxford.
- (1995, January) Topological fluid mechanics. Mathematics Department, ETH, Zürich.
- (1995, March) Geometric and topological aspects of vortex filaments. Centre for Nonlinear Dynamics, University College London.
- (1995, November) Vortex filament dynamics and integrability. Department of Mathematics, Imperial College of Science, Technology and Medicine, London.
- (1995, December) Vortex filament dynamics and integrability from a geometric and topological viewpoint. Dept. of Mech. & Aeron. Eng., University of Roma “La Sapienza”.
- (1996, February) Dynamics of twisted and knotted magnetic flux-tubes. Department of Mathematics, University College London.
- (1997, February) Topological ideas in fluid mechanics. Department of Mathematics, University of Newcastle-upon-Tyne.
- (1997, March) Geometric and topological aspects of fluid flows. Department of Mathematics, University of Warwick.
- (1997, March) Recent progress in topological fluid mechanics. Department of Mathematics, University of Bristol.
- (1997, April) Relaxation of knotted magnetic flux tubes. Scuola Normale Superiore, Pisa.
- (1997, May) Geometric and topological aspects of integrable vortex dynamics. EC-Joint Research Centre, Ispra.
- (1997, May) New results on evolution of vortex knots. Magdalen College & Mathematical Institute, University of Oxford.
- (1997, July) Geometric and topological aspects of integrable vortex dynamics. Institüt für Hydromechanik, ETH, Zürich.
- (1998, February) Mechanical relaxation of magnetic knots. Department of Mathematics, University of St. Andrews.
- (1998, March) Magnetic knots. Courant Institute of Mathematical Sciences, U. New York.
- (1998, April) Linking numbers and applications. Mathematics Department, École Politèchnique Federal de Lausanne.
- (1998, October) Knot theory and topological fluid mechanics. Institute SIS, EC Joint Research Centre, Ispra.
- (1999, December) Vortex knot evolution and complexity measures. Department of Mathematics, University College London.