@article{MASLO_2007_57_2_a0,
     author = {Allen, P. J. and Kim, Hee Sik and Neggers, J.},
     title = {Companion $d$-algebras},
     journal = {Mathematica slovaca},
     pages = {93--106},
     year = {2007},
     volume = {57},
     number = {2},
     mrnumber = {2357809},
     zbl = {1150.06323},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_2007_57_2_a0/}
}