@article{106706, author = {Anatoli P. Kombarov}, title = {On rectangular covers of $X^2\setminus \Delta$}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {030}, year = {1989}, pages = {81-83}, zbl = {0667.54014}, mrnumber = {995704}, language = {en}, url = {http://dml.mathdoc.fr/item/106706} }
Kombarov, Anatoli P. On rectangular covers of $X^2\setminus \Delta$. Commentationes Mathematicae Universitatis Carolinae, Tome 030 (1989) pp. 81-83. http://gdmltest.u-ga.fr/item/106706/
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