The $U_L(3) \times U_R(3)$ Extended Nambu--Jona-Lasinio Model in   Differential Regularization
  We employ the method of differential regularization to calculate explicitly the one-loop effective action of a bosonized $U_L(3)\times U_R(3)$ extended Nambu--Jona-Lasinio model consisting of scalar, pseudoscalar, vector and axial vector fields. 
Yaw-Hwang Chen, Su-Long Nyeo, Yeou-Wei Yang (National Cheng Kung   Univ., Taiwan, ROC)