TY  - JOUR
AU  - D. A. Higgs
TI  - Matroids and duality
JO  - Colloquium Mathematicum
PY  - 1969
SP  - 215
EP  - 220
VL  - 20
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-20-2-215-220/
DO  - 10.4064/cm-20-2-215-220
LA  - en
ID  - 10_4064_cm_20_2_215_220
ER  -