@article{ARM_2006_42_3_a4,
     author = {Ge, Ying},
     title = {On three equivalences concerning {Ponomarev-systems}},
     journal = {Archivum mathematicum},
     pages = {239--246},
     year = {2006},
     volume = {42},
     number = {3},
     mrnumber = {2260382},
     zbl = {1164.54363},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2006_42_3_a4/}
}