16G10 13 16D10 12 16D90 5 16P40 5 16D40 4 16G20 4 16D99 3 16E10 3 16G60 3 16N80 3 module 3 quiver 3 tiled order 3 16D50 2 16D70 2 16G30 2 16R10 2 16W10 2 16W25 2 Dedekind finite modules 2 Gorenstein tiled order 2 Hopfian modules 2 finitistic dimension 2 index of semiperfect ring 2 nodal algebras 2 partially ordered set 2 preradical 2 ring 2 semiperfect ring 2 stratified algebra 2