NAVIER-STOKES EQUATIONS AND RELATED NONLINEAR PROBLEMS PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE NSEC-6 PALANGA, LITHUANIA, MAY 22-29,1997 EDITORS: H. AMANN, G. P. GALDI, K. PlLECKAS AND V. A. SOLONNIKOV /// VSP III UTRECHT, THE NETHERLANDS 1998 VILNIUS, LITHUANIA TOKYO, JAPAN