TY - JOUR AU - Gerth, III, Frank TI - Densities for certain $l$-ranks in cyclic fields of degree $l^n$ JO - Compositio Mathematica PY - 1986 SP - 295 EP - 322 VL - 60 IS - 3 PB - Martinus Nijhoff Publishers UR - http://www.numdam.org/item/CM_1986__60_3_295_0/ LA - en ID - CM_1986__60_3_295_0 ER -