Buckley, Stephen M. and Falk, K. (2013) Natural maps between CAT(0) boundaries. New York Journal of Mathematics, 19. pp. 13-22. ISSN 1076-9803
Buckley, Stephen M. and Falk, K. (2011) Rough CAT(0) Spaces. Working Paper. (Preprint) Department of Mathematics, National University of Ireland Maynooth. (Unpublished)
Buckley, Stephen M., Falk, K. and Wraith, David (2009) Ptolemaic spaces and CAT (0). Glasgow Mathematical Journal, 51. pp. 301-314. ISSN 0017-0895