... estimate for a system of elliptic quasi-variational inequalities, International Journal of Mathematics and Mathematical Sciences 2003(2003), no. 24, 1547–1561.[6] P. G. Ciarlet and P A. Raviart, ... estimate for a noncoercive system of elliptic quasi-variational inequalities: a sim-ple proof, Applied Mathematics E-Notes 5 (2005), 97–102.[5] M. Boulbrachene, M. Haiour, and S. Saadi, L∞ -error ... deals with a system of elliptic quasivariational inequalities with noncoercive operators. Two different approaches are developed to prove L∞ -error estimates of a con-tinuous piecewise linear approximation.Copyright...