Samoilenko YS, Moskaleva YP. Systems of $n$ subspaces and representations of $*$-algebras generated by projections. MFAT [Internet]. 2006 Mar. 25 [cited 2025 Dec. 16];12(1):57-73. Available from: https://zen.imath.kiev.ua/index.php/mfat/article/view/302