I. S. Litvinchev On improved Choi-Goldfarb solution-containing ellipsoids in linear programming. Operations Research Letters , v.27, N1 , p. 29-37 , 01.2000 И. С. Литвинчев Эллипсоиды содержащие оптимальные решения задачи линейного программирования. Журнал вычислительной математики и математической физики , т. 40, №2 , с. 200-210 , 01.2000 I. S. Litvinchev , S. Rangel , O. Chacon A priori error bounds for the aggregated generalized transportation problem. Abstracts of INFORMS Annual Meeting, San Antonio, 2000 , p. 286 , 01.2000 I. S. Litvinchev Ellipsoids Containing Optimal Solutions of the Linear Programming Problem. Computational Mathematics and Mathematical Physics , Vol.40 No.2 , p. 178–188 , 01.2000 I. S. Litvinchev , G. N. Silva , Y. P. Treskov Aggregation-based decomposition for multi-divisional models. Известия РАН. Теория и системы управления , 2 , p. 84-94 , 01.1999 I. S. Litvinchev , S. Rangel Localization of the optimal solution and a posteriori bounds for aggregation. Computers & Operations Research , vol.26 N10-11 , p. 967-988 , 01.1999 I. S. Litvinchev Localization of the optimal solution and apriori bounds for aggregation. INFORMS, Cincinnati, Spring 1999 , p. 46 , 01.1999 I. S. Litvinchev On solution-containing ellipsoids in LP. Abstracts of the 2nd Moscow International Conference on Operations Research, Moscow, Russia, 1998 , p. 21 , 01.1998 I. S. Litvinchev Interior point approach from feasible directions point of view. Proc. of the International Workshop "Numerical Linear Algebra and Optimization", Curitiba, Brazil, 1997 , p. 43-46 , 01.1997 I. S. Litvinchev On sharp non-smooth potential function in interior point approach. Abstracts of the XX Congress on Computational and Applied Mathematics, Gramado, Brazil, 1997 , p. 270 , 01.1997