@article{MS2_1976__38_166466,
     author = {Malcolm P. Griffin},
     title = {The {Pythagorean} closure of fields.},
     journal = {Mathematica Scandinavica},
     pages = {177--191},
     publisher = {mathdoc},
     volume = {38},
     year = {1976},
     zbl = {0339.12101},
     url = {http://geodesic.mathdoc.fr/item/MS2_1976__38_166466/}
}