@article{MS2_1974__35_166387,
     author = {Don A. Mattson},
     title = {Maximal {p-Systems} and {Realcompleteness.}},
     journal = {Mathematica Scandinavica},
     pages = {215--222},
     publisher = {mathdoc},
     volume = {35},
     year = {1974},
     zbl = {0316.54012},
     url = {http://geodesic.mathdoc.fr/item/MS2_1974__35_166387/}
}