TY  - JOUR
AU  - COSTA, ANTONIO F.
AU  - HALL, WENDY
AU  - SINGERMAN, DAVID
TI  - DOUBLES OF KLEIN SURFACES
JO  - Glasgow mathematical journal
PY  - 2012
SP  - 507
EP  - 515
VL  - 54
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089512000109/
DO  - 10.1017/S0017089512000109
ID  - 10_1017_S0017089512000109
ER  -