Hakopian, Y.H. and Hovhannisyan, H.A. (2003) “ALGEBRAIC MULTIGRID PRECONDITIONER FOR SECOND ORDER FINITE ELEMENT APPROXIMATIONS IN RECTANGULAR DOMAINS. II. MULTIGRID PRECONDITIONER”, Proceedings of the YSU A: Physical and Mathematical Sciences, 37(2 (201), pp. 18–24. doi:10.46991/PYSUA.2003.37.2.018.