TY  - JOUR
AU  - Hell, Pavol
AU  - Rival, Ivan
TI  - Absolute Retracts and Varieties of Reflexive Graphs
JO  - Canadian journal of mathematics
PY  - 1987
SP  - 544
EP  - 567
VL  - 39
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1987-025-1/
DO  - 10.4153/CJM-1987-025-1
ID  - 10_4153_CJM_1987_025_1
ER  -