The Friedlander-Gordon-Miller conjecture is true.
Brian Alspach, Donald L. Kreher, Adrián Pastine · Figshare · 2017
We complete the proof of the Friedlander, Gordon and Miller Conjecture that every finite abelian group whose Sylow 2-subgroup either is trivial or both non-trivial and non-cyclic is R-sequenceable. This settles a question of Ringel for abelian groups.