@article{NSJOM_2011_41_1a_2,
     author = {M. F. Hasler, and J.-A. Marti},
     title = {Pointvalue characterization in

 multi-parameter algebras},
     journal = {Novi Sad Journal of Mathematics},
     pages = {21-31},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2011_41_1a_2/}
}