V. Ruas, FINITE ELEMENT METHODS FOR THE 3-FIELD STOKES SYSTEM IN R(3) - GALERKIN METHODS, Modelisation mathematique et analyse numerique, 30(4), 1996, pp. 489-525
In this work several new finite element methods for solving the three-
field Stokes system associated with viscoelastic flow problems in thre
e-dimension space are introduced. The methods presented are based on t
he standard Galerkin formulation, and complete proofs of first and sec
ond order convergence for the corresponding approximations are given f
or most of them.