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@article{MOMA_1985__99_178224, author = {Zolt\'an Sasv\'ari}, title = {On {Bounded} {Functions} with a {Finite} {Number} of {Negative} {Squares.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {223--234}, publisher = {mathdoc}, volume = {99}, year = {1985}, zbl = {0557.43004}, url = {http://geodesic.mathdoc.fr/item/MOMA_1985__99_178224/} }
Zoltán Sasvári. On Bounded Functions with a Finite Number of Negative Squares.. Monatshefte für Mathematik, Tome 99 (1985), pp. 223-234. http://geodesic.mathdoc.fr/item/MOMA_1985__99_178224/