@article{CMUC_1994__35_2_a2,
     author = {Lavri\v{c}, Boris},
     title = {The nil radical of an {Archimedean} partially ordered ring with positive squares},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {231--238},
     publisher = {mathdoc},
     volume = {35},
     number = {2},
     year = {1994},
     mrnumber = {1286569},
     zbl = {0805.06017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1994__35_2_a2/}
}