@article{107230, author = {Ji\v r\'\i\ Kar\'asek}, title = {A remark concerning $x$-systems}, journal = {Archivum Mathematicum}, volume = {021}, year = {1985}, pages = {177-179}, zbl = {0594.20061}, mrnumber = {833128}, language = {en}, url = {http://dml.mathdoc.fr/item/107230} }
Karásek, Jiří. A remark concerning $x$-systems. Archivum Mathematicum, Tome 021 (1985) pp. 177-179. http://gdmltest.u-ga.fr/item/107230/
Theory of x-ideals, Acta Math. 107 (1962), 1-52. (1962) | MR 0148773 | Zbl 0108.26002