Title of article :
Global Solvability on the Torus for Certain Classes of Operators in the Form of a Sum of Squares of Vector Fields
Author/Authors :
Gerson Petronilho، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1998
Journal title :
JOURNAL OF DIFFERENTIAL EQUATIONS
Journal title :
JOURNAL OF DIFFERENTIAL EQUATIONS