Minimal Cubings. - Graham Niblo; Michah Sageev; Peter Scott; Gadde A. Swarup (Int. J. Algebra Comput., 2005)

Surface Subgroups of Right-Angled Artin Groups. - John Crisp; Michah Sageev; Mark V. Sapir (Int. J. Algebra Comput., 2008)