@article{10_4064_cm115_1_7,
     author = {Justyna Kosakowska},
     title = {Ringel{\textendash}Hall algebras of hereditary pure
 semisimple coalgebras},
     journal = {Colloquium Mathematicum},
     pages = {65--85},
     publisher = {mathdoc},
     volume = {115},
     number = {1},
     year = {2009},
     doi = {10.4064/cm115-1-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm115-1-7/}
}