@article{10_4064_cm103_2_13,
     author = {Tomohiro Yamada},
     title = {Odd perfect numbers of a special form},
     journal = {Colloquium Mathematicum},
     pages = {303--307},
     publisher = {mathdoc},
     volume = {103},
     number = {2},
     year = {2005},
     doi = {10.4064/cm103-2-13},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm103-2-13/}
}