May '03: School of Physics, Univ. of Birmingham, UK.

Sep '02: Lab. Mech. & Thermodyn., Univ. of Aix-Marseille III, Marseille, France.

Jun '02: Inst. Appl. Maths, Univ. of Bonn, Bonn, Germany.

June '02: Lab. Modell. in Mech., Univ. Pierre & Marie Curie (Paris VI), Paris, France.

Mar '02: Dept Chem. Engng, Purdue Univ. West Lafayette, IN, USA. Mar '01: School of Engng Sciences, Univ. of Southampton, Southampton, UK.

Oct '00: Dept of Appl.\ Maths, Univ. of Liverpool, Liverpool, UK.

Sep '00: Dept of Chem. Engng, Univ. of California at Santa Barbara, Santa Barbara, CA, USA.

Sep '00: Dept of Mech. Engng, Johns Hopkins Univ., Baltimore, MD, USA.

Sep '00: School of Chem. Engng, Cornell Univ., Ithaca, NY, USA.

Feb '00: School of Mathematical Sciences, Univ. of Nottingham, Nottingham, UK.

Feb '00: School of Physics, Univ. of Birmingham, Birmingham, UK.

May '99: MARS Center, Naples, Italy.

Sep '98: Dept Appl. Maths, Univ. of Birmingham, Birmingham, UK.

Jun '98: Inst. of Fluid Mech. & Heat Transfer, Techn. Univ. of Vienna, Vienna, Austria.

Mar '98: Dept~of Maths, Univ. of Manchester, Manchester, UK.

Feb '98: Research Center for Molecul. Modell., Univ. of Mons-Hainaut, Mons, Belgium.

Jan '97: Dept of Maths, University College London, London, UK.

Dec '96: Dept of Appl. Math. Studies, Univ. of Leeds, Leeds, UK.

Nov '96: Mathematical Inst., Univ. of Oxford, Oxford, UK.

Nov '96: Dept of Mech. Engng, Wayne State Univ., Detroit, MI, USA.

Nov '96: Dept of Maths, Univ. of Calif. at Los Angeles, CA, USA.

Nov '96: Dept of Chem. Engng, Stanford Univ., Palo Alto, CA, USA.

Nov '96: Inst. of Paper Science & Technology, Atlanta, GA, USA.

Nov '96: 3M Engng Systems & Technology, St. Paul, MN, USA.

Nov '96: Inst. of Maths & Appl., Univ. of Minnesota, Minneapolis, MN, USA.

Oct '96: Eastman Kodak Co., Rochester, NY, USA.

Oct '96: Dept of Appl. Maths & Theor. Phys., Univ. of Cambridge, Cambridge, UK.

Sep '96: Inst. of Mechanics, Moscow State Univ., Moscow, Russia.

Sep '95: Kodak Ltd, Harrow, UK.

Oct '93: Inst. of Mechanics, Moscow State Univ., Moscow, Russia.

May '93: Inst. of Appl. Mech., Russian Acad. of Sciences, Moscow, Russia.

Mar '93: Steklov Mathematical Inst., Moscow, Russia.

Feb '93: Inst. of Mechanics, Moscow State Univ., Moscow, Russia.

Nov '92: Dept of Mech. & Maths, Moscow State Univ., Moscow, Russia.

May '92: Dept. of Mech. & Maths, Moscow State Univ., Moscow, Russia.

Apr '92: Moscow State Inst. of Food Industry, Moscow, Russia.

Feb '92: Inst. of Mechanics, Moscow State Univ., Moscow, Russia.

Apr '89: Dept of Maths, Univ. of Bologna, Bologna, Italy.

Apr '89: Dept Maths, Univ. of Rome `La Sapienza', Rome, Italy.

Feb '89: Inst. of Aerodynamics, Univ. of Naples, Naples, Italy.

Nov '83: Steklov Mathematical Inst., Moscow, USSR.