@article{AMI_2017_47_a13,
     author = {Tomohiro Yamada},
     title = {Infinitary superperfect numbers},
     journal = {Annales mathematicae et informaticae},
     pages = {211--218},
     publisher = {mathdoc},
     volume = {47},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2017_47_a13/}
}