A. Silverberg and Y. Zarhin, `Semistable reduction and torsion subgroups of abelian varieties,'
Annales de l'Institut Fourier, 45,1995, 403-420.

A. Silverberg and Y. Zarhin, `Connectedness results for l-adic representations associated to abelian varieties,'
Compositio Mathematica , 97, 1995, 273-284.

Y. Zarhin, `A finiteness theorem for unpolarized abelian varieties over number fields with prescribed places of bad reduction,'
Inventiones Mathematica, 79, 1985, 309-321.