@article{10_4153_CJM_1972_114_7,
     author = {Marrero, O. and Butson, A. T.},
     title = {Modular {Hadamard} {Matrices} and {Related} {Designs,} {II}},
     journal = {Canadian journal of mathematics},
     pages = {1100--1109},
     year = {1972},
     volume = {24},
     number = {6},
     doi = {10.4153/CJM-1972-114-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-114-7/}
}