- Bui A. T. and G. Ellis, "Computing Bredon Homology", submitted.
(Available as a pdf file.)

- P. Brendel, G. Ellis, M. Juda, M. Mrozek, "An algorithm for the
fundamental group of regular CW complexes", submitted. (Available as a pdf
file.)

- G. Ellis, "Cohomological periodicities of crystallographic
groups", published in J. Algebra 2015. (Available as a pdf file.)

- P. Brendel, P. Dlotko, G. Ellis, M. Juda, M. Mrozek, "Computing fundamental groups from point clouds", published in AAECC, 2015. (Available as a pdf file.)

- G. Ellis, "Computational Homotopy", poster presented at the Topological Systems Workshop at the IMA Minnesota, 3-7 March 2014. (Available as a pdf file.)

- G. Ellis and Le Van Luyen, "Homotopy 2-types of low order", published in Experimental Mathematics. (Available as a pdf file.)

- Bui A. T. and G. Ellis, "The homology of SL
_{2}(Z[1/m]) for small m", published in Journal of Algebra. (Available as a pdf file.)

- G. Ellis and F. Hegarty, "Computational homology of finitely tessellated spaces", published in Journal of Homotopy and Related Structures. (Available as a pdf file.)

- G. Ellis and Le Van Luyen, "Computational homology of n-types", published in Journal of Symbolic Computation. (Available as a pdf file.)

- M. Dutour Sikiric, G. Ellis and A. Schuermann, "On the integral homology of PSL(4,Z) and other arithmetic groups", published in Journal of Number Theory. (Available as a pdf file.)

- G. Ellis and S.A. King, "Persistent homology of groups", published in J Group Theory. (Available as a pdf file.)

- S.A. King, D.J. Green and G. Ellis, "The mod-2 cohomology ring of the third Conway group is Cohen-Macaulay", published in Algebraic and Geometric Topology. (Available as a pdf file.)

- A. Romero, G. Ellis and J. Rubio, "Interoperating between computer algebra systems: computing homology of groups with Kenzo and GAP". Published in ISAAC Proceedings 2009. (Available as a pdf file.)

- G. Ellis and P. Smith, "Computing group cohomology rings from the Lyndon-Hochschild-Serre spectral sequence". Published in J. Symbolic Computation, modulo some improvements. (Available as a pdf file.)

- M. Dutour and G. Ellis, "Wythoff polytopes and low-dimensional homology of Mathieu groups". Published in J. Algebra. (Available as a pdf file.)

- M. Clancy and G. Ellis, "Twisted Artin groups". Published in Journal of K-Theory. (Available as a pdf file.)

- G. Ellis and R. Mikhailov, "A colimit of classyfying spaces". Published in Advances in Mathematics. (Available as a pdf file.)

- G. Ellis, H. Mohammadzadeh and H. Tavallaee, "Computing covers of Lie algebras". Published in AMS Contemporary Mathematics. (Available as a pdf file.)

- G. Ellis, "Homological Algebra Programming". Appeared in AMS Contemporary Mathematics. (Available as a pdf file.)

- G. Ellis and A.G. Williams, "Cohomology of generalized triangle groups". Appeared in Comment Math. Helv. (Available as a pdf file.)

- G. Ellis, J. Harris and E. Skoldberg, "Polytopal resolutions for finite groups". Appeared in Crelle's Journal (Available as a ps file .)

- G. Ellis and E. Skoldberg, "The K(pi,1) conjecture for a class of Artin groups. To appear in Comment. Math. Helv. (Available as a pdf file .)

- G. Ellis, "Computing resolutions of groups", 52 page preprint + GAP code. Appeared in J. Symbolic Computation. (Available as pdf file or ps file. Accompanying code available as text file.)

- G. Ellis, "A Magnus-Witt type isomorphism for non-free groups", Georgian Mathematical Journal Volume 9, Number 4 (2002) 703-708. (Available as pdf file or ps file.)

- J.M. Casas, G. Ellis, M. Ladra and T. Pirashvili, "Derived functors and the homology of n-types", J. Algebra 256 (2002) 583-598. (Available as pdf file or ps file.)

- J. Ellis and J. Weigold, "A bound on the Schur multiplier of a prime-power group", appeared in J. Australian Math. Soc. (Available as a pdf file or ps file.)

- G. Ellis, "Enumerating prime-power homotopy k-types", appeared in Math. Zeitschrift. (Available as a pdf file or ps file.)

- G. Ellis and I. Kholodna, "Three-dimensional presentations for the groups of order at most 30", appeared in London Math. Soc. J. Computation and Math. (Available as a pdf file or ps file. Accompanying GAPV3 and GAPV4 code available as text files. An accompanying HTML appendix can be accessed here.)

- G. Ellis, "On the relation between the upper central series and lower central quotients of a group", appeared in Trans. American Math. Soc. (Available as a pdf file or ps file.)

- G. Ellis, I. Kholodna, "Computing second cohomology of finite groups with trivial coefficients", appeared in Homology, Homotopy and Applications. (Available as a pdf file or ps file. Accompanying MAGMA code available as a text file.)