TY - JOUR AU - Soogil Seo TI - On first layers of $\mathbb{Z}_p$-extensions II JO - Acta Arithmetica PY - 2011 SP - 385 EP - 397 VL - 150 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa150-4-4/ DO - 10.4064/aa150-4-4 LA - en ID - 10_4064_aa150_4_4 ER -