TY - JOUR AU - B. Aqzzouz AU - M. Kadiri TI - Infinite dimensional extension of A.\,P.~Calder\'on's theorem on positive semidefinite biquadraric forms JO - Lobachevskii journal of mathematics PY - 2002 SP - 3 EP - 8 VL - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/LJM_2002_10_a0/ LA - en ID - LJM_2002_10_a0 ER -