• Asymptotic structures in Banach spaces. Thesis. University of Alberta, 2003. Advisor: N. Tomczak-Jaegermann. (pdf)
• Envelope functions and asymptotic structures in Banach spaces, Studia Math. 164 (2004), 283-306 (pdf)
• On the structure of symmetric sequences in Orlicz sequence spaces,  Canad. Math. Bull., 50 (2007), 138-148 (pdf)
• On Banach spaces with few spreading models, Proc. Amer. Math. Soc. 134 (2006), 1339-1345. (pdf)
• On closed ideals in $L(\ell_p, \ell_q)$, (with T. Schlumprecht, N. Tomczak-Jaegermann and V. Troitsky), Studia Math., 179 (2007), 239-262. (pdf)
• On simple Banach spaces, (with T. Schlumprecht, N. Tomczak-Jaegermann and V. Troitsky), preprint
• Lattice structures and spreading models, (with S. Dilworth and E. Odell), Israel J. Math., 161 (2007), 387-410. (pdf)
• Semi-homogeneous bases in Orlicz sequence spaces, (with M. Gonzales and M. Wojtowicz), Function Spaces, Contemporary Math. 435. (pdf)
• Orlicz sequence spaces with denumerable sets of symmetric sequences, (with S. Dilworth), to appear in the "Gruyter Proceedings in Mathematics" (pdf)