TY - JOUR AU - Janjić, Milan TI - Some classes of numbers and derivatives JO - Journal of integer sequences PY - 2009 VL - 12 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JIS_2009__12_8_a7/ LA - en ID - JIS_2009__12_8_a7 ER -