TY - JOUR AU - Lilu Zhao TI - Exceptional sets in Waring's problem: two squares and $s$ biquadrates JO - Acta Arithmetica PY - 2014 SP - 369 EP - 379 VL - 162 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa162-4-4/ DO - 10.4064/aa162-4-4 LA - en ID - 10_4064_aa162_4_4 ER -