TY - JOUR AU - J. Kurek AU - W. M. Mikulski TI - The natural linear operators $T^*\rightsquigarrow TT^{(r)}$ JO - Colloquium Mathematicum PY - 2003 SP - 37 EP - 47 VL - 95 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm95-1-3/ DO - 10.4064/cm95-1-3 LA - en ID - 10_4064_cm95_1_3 ER -