@article{DMDICO_2005_25_1_a1,
     author = {Sajbura, Katarzyna},
     title = {Level sets of continuous functions increasing with respect to each variable},
     journal = {Discussiones Mathematicae. Differential Inclusions, Control and Optimization},
     pages = {19--26},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {2005},
     zbl = {1170.26302},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMDICO_2005_25_1_a1/}
}