Dekimpe K, de Rock B, Penninckx P. The $R_{\infty}$ property for infra-nilmanifolds. TMNA [Internet]. 2009 Dec. 1 [cited 2024 Apr. 20];34(2):353-7. Available from: https://apcz.umk.pl/TMNA/article/view/TMNA.2009.047