%0 Journal Article %A V. I. Arnautov %A G. N. Ermakova %T Unrefinable chains when taking the infimum in the lattice of ring topologies for a~nilpotent ring %J Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica %D 2017 %P 71-76 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/BASM_2017_2_a5/ %G en %F BASM_2017_2_a5