@article{105535, author = {Ladislav Bican and Pavel Jambor and Tom\'a\v s Kepka and Petr N\v emec}, title = {Preradicals}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {015}, year = {1974}, pages = {75-83}, zbl = {0277.16020}, mrnumber = {0347906}, language = {en}, url = {http://dml.mathdoc.fr/item/105535} }
Bican, Ladislav; Jambor, Pavel; Kepka, Tomáš; Němec, Petr. Preradicals. Commentationes Mathematicae Universitatis Carolinae, Tome 015 (1974) pp. 75-83. http://gdmltest.u-ga.fr/item/105535/
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