Kaehler Metrics and Yukawa Couplings in Magnetized Brane Models
  Using the field theoretical approach introduced by Cremades, Ibanez and Marchesano for describing open strings attached to D9 branes having different magnetizations, we give a procedure for determining the Kaehler metrics of those open strings in toroidal compactifications. 
P. Di Vecchia, A. Liccardo, R. Marotta and F. Pezzella