Grigoryan AB. ALGEBRAIC MULTIGRID PRECONDITIONER FOR ELLIPTIC PROBLEMS WITH MIXED TYPE BOUNDARY CONDITIONS II. MULTIGRID PRECONDITIONER. Proc. YSU A: Phys. Math. Sci. [Internet]. 2006 May 30 [cited 2024 Sep. 20];40(2 (210):41-8. Available from: https://pub.ysu.am/index.php/proceedings-phys-math/article/view/vol40_no2_2006_pp041-048