- (2000, February) Measures of structural complexity for vortex tangles. Department of Mathematics, University of Newcastle-upon-Tyne.
- (2001, October) Recent developments in topological fluid mechanics. School of Mathematics, Kyushu University.
- (2001, October) Knot theory apllied to fluid flows. Department of Mathematics, University of Tokyo.
- (2001, October) Tropicity and complexity measures for vortex flows. Department of Physics, Ochanomizu University, Tokyo
- (2001, December) From vortex knots to complex systems. Department of Mathematics, University of Warwick.
- (2002, April) Algebraic and geometric measures of complexity. Institut Joseph Fourier, U. Grenoble.
- (2002, May) New developments in geometric and topological fluid dynamics. Department of Advanced Sciences and Technology, University of Piemonte Orientale, Alessandria.
- (2002, November) Tropicity and complexity measures for vortex flows. Laboratoire de Physique Statistique, École Normale Superieure, Paris.
- (2003, March) Energy, helicity and crossing number relations for complex flows. Department of Mathematics, University of Exeter.
- (2003, April) Geometric integrability theory and vortex dynamics. Department of Mathematics and Applications, University of Milano-Bicocca.
- (2003, June) Energy, helicity and crossing number relations for complex flows. Department of Mathematics, Politecnico di Milano.
- (2004, March) Recent developments in topological fluid dynamics. Department of Mathematics and Physics, University Cattolica del Sacro Cuore, Brescia.
- (2004, November) Evolution of magnetic knots to minimal braids. Department of Mathematics and Physics, University Cattolica del Sacro Cuore, Brescia.
- (2004, December) From magnetic knots to minimal braids. Department of Mathematics and Applications, University of Milano-Bicocca.
- (2005, March) Inflexional disequilibrium of magnetic knots. Institute for Scientific Interchange, Villa Gualino, Torino.
- (2005, April) On some new results in topological fluid mechanics. Department of Mathematics, U. Rome “La Sapienza”, Rome.
- (2005, April) From magnetic knots to minimal braids. Department of Mathematics, University of Pisa, Pisa.
- (2006, April) Measures of structural complexity for vortex tangles. GNFM meeting, Montecatini Terme.
- (2006, November) Modern developments in DNA modeling. Department of Mathematics and Applications, University of Milano-Bicocca.
- (2006, November) Mathematical modeling of DNA supercoiling. Department of Mathematical Sciences, University of Bergamo.
- (2007, March) Detecting structural complexity: new results and applications. Department of Mathematics and Applications, University of Padua.
- (2007, April) New results in structural complexity. Department of Mathematics and Applications, University of Milano-Bicocca.
- (2007, April) Structural complexity: a new frontier. Department of Mathematics and Physics, University Cattolica del Sacro Cuore, Brescia.
- (2007, May) Structural complexity: a new frontier. Department of Mathematics, University of Rome “La Sapienza”.
- (2007, May) From DNA analysis to knot theory. Department of Methods and Models for Mathematics, University of Rome “La Sapienza”.
- (2008, February) Topology bounds energy of knots and links. Department of Mathematics, University of Pavia.
- (2008, April) Topological bounds on magnetic energy of knots and links. Department of Methods and Models for Mathematics, University of Rome “La Sapienza”.
- (2008, May) “Topology bounds energy of knots and links”, Observatoire de la CĂ´te d'Azur, Nice.
- (2008, May) “Multiple folding and packing in DNA modeling”, Laboratoire DieudonnĂ©, U. Nice Sophia Antipolis.
- (2008, December) Topological bounds on the groundstate energy of knots and links. Department of Applied Mathematics, University of Pisa.
- (2009, December) On Gauss' derivation of linking number and the groundstate energy of magnetic knots. Department of Mathematics “F. Enriques”, U. Milano.