TY  - JOUR
AU  - Witbooi, P. J.
TI  - Relative Homotopy in Relational Structures
JO  - Canadian mathematical bulletin
PY  - 2008
SP  - 310
EP  - 320
VL  - 51
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2008-031-8/
DO  - 10.4153/CMB-2008-031-8
ID  - 10_4153_CMB_2008_031_8
ER  -