Lluis Eriksson (2026). Exact small values of m(N,3) for arithmetic progressions with every common difference (Green's Problem 37). AIRR.SCIENCE, ARR-2026-0P0HZ24A6Z9A1A20, v1. https://airr.science/papers/ARR-2026-0P0HZ24A6Z9A1A20/versions/v1/ Research preprint; ARR-2026-0P0HZ24A6Z9A1A20 v1. Not peer reviewed by AIRR. Working paper; not admitted to the AIRR accepted collection.