@article{10_4064_cm136_1_9,
     author = {Maciej Karpicz and Marju Purin},
     title = {The vanishing of self-extensions
 over $n$-symmetric algebras of quasitilted type},
     journal = {Colloquium Mathematicum},
     pages = {99--108},
     publisher = {mathdoc},
     volume = {136},
     number = {1},
     year = {2014},
     doi = {10.4064/cm136-1-9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm136-1-9/}
}