[AW10] Alp, M. and Wensley, C. D., Automorphisms and homotopies of groupoids and crossed modules, Applied Categorical Structures, 18 (2010), 473–495.
[BMPW02] Brown, R., Moore, E. J., Porter, T. and Wensley, C. D., Crossed complexes, and free crossed resolutions for amalgamated sums and HNN-extensions of groups, Georgian Math. J., 9 (2002), 623–644.
[Bro88] Brown, R., Topology: a geometric account of general topology, homotopy types, and the fundamental groupoid, Ellis Horwood, Chichester (1988).
[Bro06] Brown, R., Topology and groupoids, Booksurge LLC, S.Carolina (2006).
[GH17] Gutsche, S. and Horn, M.,
AutoDoc - Generate documentation from GAP source code (Version 2017.09.15)
(2017)
(
GAP package, https://github.com/gap-packages/AutoDoc
).
[Hig76] Higgins, P., The fundamental groupoid of a graph of groups, J. London Math. Soc., 13 (1976), 145–149.
[Hig05] Higgins, P.,
Categories and groupoids,
Reprints in Theory and Applications of Categories
(2005),
1–195 pages
(
http://www.tac.mta.ca/tac/reprints/articles/7/tr7abs.html
).
[Hor17] Horn, M.,
GitHubPagesForGAP - Template for easily using GitHub Pages within GAP packages (Version 0.2)
(2017)
(
GAP package, https://gap-system.github.io/GitHubPagesForGAP/
).
[LN17] Lübeck, F. and Neunhöffer, M.,
GAPDoc (version 1.6),
RWTH Aachen
(2017)
(
GAP package,
http://www.math.rwth-aachen.de/~Frank.Luebeck/GAPDoc/index.html
).
[Moo01] Moore, E. J.,
Graphs of Groups:
Word Computations and Free Crossed Resolutions,
Ph.D. thesis,
University of Wales, Bangor
(2001)
(
http://www.maths.bangor.ac.uk/research/ftp/theses/moore.ps.gz
).
[Ser80] Serre, J., Trees, Springer-Verlag, Berlin (1980).
generated by GAPDoc2HTML