%0 Journal Article %A Pollack, Robert %A Weston, Tom %T Kida's formula and congruences %J Documenta mathematica %D 2006 %P 615-630 %V John H. Coates' Sixtieth Birthday %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_2006__S5__a6/ %G en %F DOCMA_2006__S5__a6