TY - JOUR AU - Vladimir Rakočević AU - Jaroslav Zemánek TI - Lower s-numbers and their asymptotic behaviour JO - Studia Mathematica PY - 1988 SP - 231 EP - 239 VL - 91 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm-91-3-231-239/ DO - 10.4064/sm-91-3-231-239 LA - en ID - 10_4064_sm_91_3_231_239 ER -