TY - JOUR AU - Riddell, J. TI - A Lattice Point Problem Related to Sets Containing No l-Term Arithmetic Progression JO - Canadian mathematical bulletin PY - 1971 SP - 535 EP - 538 VL - 14 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-095-0/ DO - 10.4153/CMB-1971-095-0 ID - 10_4153_CMB_1971_095_0 ER -