@article{JSFU_2014_7_1_a9, author = {Chris W. Parker and Atapattu A. C. Kanchana}, title = {Examples of groups with the same number of subgroups of every index}, journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika}, pages = {95--99}, publisher = {mathdoc}, volume = {7}, number = {1}, year = {2014}, language = {en}, url = {http://geodesic.mathdoc.fr/item/JSFU_2014_7_1_a9/} }