@article{10_4153_CJM_1972_125_2,
     author = {Heinzer, William and Ohm, Jack},
     title = {Defining {Families} for {Integral} {Domains} of {Real} {Finite} {Character}},
     journal = {Canadian journal of mathematics},
     pages = {1170--1177},
     year = {1972},
     volume = {24},
     number = {6},
     doi = {10.4153/CJM-1972-125-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-125-2/}
}