%0 Journal Article %A Pawel Traczyk %T Non-Trivial negative links have positive signature. %J Manuscripta mathematica %D 1988 %P 279-284 %V 61 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1988__61_4_155315/ %F MM2_1988__61_4_155315