%0 Journal Article %A N. A. Tikhonov %A M. K. Trubetskov %A G. N. Medvedev %T Reconstruction of contamination intensity in sewage by the integral-sorption method~(ii). Model of ion-change sorption %J Matematičeskoe modelirovanie %D 2003 %P 12-16 %V 15 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM_2003_15_5_a1/ %G ru %F MM_2003_15_5_a1