TY  - JOUR
AU  - Henryk Iwaniec
TI  - On indefinite quadratic forms in four variables
JO  - Acta Arithmetica
PY  - 1977
SP  - 209
EP  - 229
VL  - 33
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/aa-33-3-209-229/
DO  - 10.4064/aa-33-3-209-229
LA  - en
ID  - 10_4064_aa_33_3_209_229
ER  -