Emeric Gioan Michel Las Vergnas Fully Optimal Bases and the Active Bijection in Graphs, Hyperplane Arrangements, and Oriented Matroids. 365-371 2007 29 Electronic Notes in Discrete Mathematics http://dx.doi.org/10.1016/j.endm.2007.07.083 db/journals/endm/endm29.html#GioanV07