Can someone please indicates where are located the Bonus Stacking Rules (resistance, morale, dodge, etc..). I've heard that there is something different in Pathfinder versus 3.5
Thanx
Different than what? 3.5? No, not really any different. The basic rules are the same, though a few things here and there have changed types.
Look in chapter 1, under Common Terms.
Or search this forum for a few dozen threads on this very subject.