Publications
Groups with cyclic relation module, Ph.D.-Thesis, University of Oregon, 1992;
Solvable groups with cyclic relation module, Journal of Pure and Appl. Algebra 90 (1993), 189-198;
Minimal Cockcroft subgroups, Glasgow Math. Journal 36 (1994), 87-90;
On perfect subgroups of one-relator groups, in Proceedings of the Workshop on Geometric and Combinatorial Methods in Group Theory, ICMS Edinburgh, 1993, ed. A. Duncan, N. Gilbert, J. Howie, Cambridge University Press 1994;
Higher generation subgroup sets and the virtual cohomological dimension of graph products, with Holger Meinert, J. London Math. Soc. (2) 53 (1996) 99-117;
Closing the relation gap by direct product stabilization, Journal of Algebra 182 (1996), 511-521;
Embeddings into efficient groups, Proc. Edinburgh Math. Soc. (40) (1997), 317-324;
The Geometry of group extensions, with Y.G.Baik and S.J. Pride, Journal of Group Theory 1 (1998), 395-416;
On the dimension of groups acting on buildings, Groups St.Andrews 1997 at Bath (ed. C.M. Campbell, E.F. Robertson, N. Ruskuc, G.C. Smith), LMS Lecture Note Series 260, Cambridge University Press;
Some aspects of efficiency, in Groups-Korea 1998 (ed. Y.G. Baik, D.L. Johnson, A.C. Kim), de Gruyter 2000;
Problems in Low Dimensional Topology, with C. Hog-Angeloni, W. Metzler, S Rosebrock, in Kluwer Encyclopedia of Mathematics Supp. II (ed. Michiel, Hazewinkel), Kluwer Academic Publisher, 2000.
A remark on the polyhedrality theorem for the Sigma-invariants of modules over abelian groups, with R. Bieri, Math. Proc. Cambridge Phil. Soc. 131 (2001), no. 1, 39-43;
The FP3-conjecture for metabelian groups, with R.Bieri, J. London Math. Soc. (2) 64 (2001), 595-610;
Homological decision problems for finitely generated groups with solvable word problem with W.A.Bogley, Internat. J. Alg. Comp. 12 (2002), 213-221.
The Sigma 2-conjecture for metabelian groups: the general case, with D. Kochloukova, J. Algebra 273 (2004), no. 2, 435--454.
On the Sigma 3-conjecture for metabelian groups, with D.Kochloukova, J. of the London Math. Soc. (3) 67 (2003), 609-625;
Improving tameness for metabelian groups, with W.A.Bogley, New York J. Math. 10 (2004), 1-8.
Building Resolutions, with D.Kochloukova, Journal of Algebra 269 (2003), 632-651.
Generalized knot complements and some aspherical ribbon disc complements, with S. Rosebrock, Journal of Knot Theory and Its Ramifications, Vol. 12, No. 7 (2003) 947–962
On the homotopy classification of complexes with aspherical fundamental group, with J. Jensen, Topology and its Applications, Vol. 153, Issue 15 (2006), 3000-3006.
Exotic Presentations and Homotopy Types for certain 1-relator groups, with J. Jensen, Algebraic & Geometric Topology 6 (2006) 3001-3011.
On distinguishing virtual knot groups from knot groups, with S. Rosebrock, Journal of Knot Theory and Its Ramifications, Vol. 19, No. 5, (2010), 695-704.
On the K-theory and homotopy theory of the Klein bottle group, with A. Misseldine, Homology, Homotopy and Applications, vol. 12(2) (2010), 1-10.
On primeness of labeled oriented trees, with S. Rosebrock, Journal of Knot Theory and its Ramifications, Vol. 21, No. 8 (2012).
Hyperbolic alternating virtual link groups, Groups Geom. Dyn. 6 (2012).
On the Dehn complex of a virtual link, with R. Byrd, Journal of Knot Theory and its Ramifications, Vol. 22, No. 7 (2013).
Factor groups of Knot and LOT groups, with R. Gerecke, R. Manheimer, B. Oakley, S. Rahman, REU at BSU 2013, arXiv:1505.06364v1 [math.GR] 23 May 2015.
On the relation gap and relation lifting problem, in Groups St Andrews 2013 (edited by C. M. Campbell, M. R. Quick, E. F. Robertson, C. M. Roney-Dougal), LMS Lecture Notes Series 422, CUP.
Aspherical word labeled oriented trees and cyclically presented groups, with S. Rosebrock, Journal of Knot Theory and its Ramifications, Vol. 24, No. 5 (2015).
Injective labeled oriented trees are aspherical, with S. Rosebrock, Mathematische Zeitschrift 287 (1); (2017); S. 199-214.
A Survey of recent Progress on some Problems in 2-dimensional Topology, Chapter 1 in Advances in Two-Dimensional Homotopy and Combinatorial Group Theory; Cambridge University Press, LMS Lect.~Notes 446; Editors: W. Metzler, S. Rosebrock; (2018).
The Relation Gap Problem, Chapter 6 in Advances in Two-Dimensional Homotopy and Combinatorial Group Theory; Cambridge University Press, LMS Lect.~Notes 446; Editors: W. Metzler, S. Rosebrock; (2018).
Relative combinatorial asphericity, with S. Rosebrock, preprint (2019)
Directed diagrammatic reducibility, with S. Rosebrock, Topology and its Applications, Volume 282, (2020).
Relative Vertex Asphericity, with S. Rosebrock, Canadian Mathematical Bulletin, Volume 64, Issue 2, (2021).
Ribbon 2-knot groups of Coxeter type, with S. Rosebrock, submitted (2021)