TY - JOUR AU - Neil Hindman AU - Imre Leader AU - Dona Strauss TI - Extensions of infinite partition regular systems JO - The electronic journal of combinatorics PY - 2015 VL - 22 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.37236/4568/ DO - 10.37236/4568 ID - 10_37236_4568 ER -