Good workouts for developing inner and lower chest?

    and inner have lower the part is your of for developing
    
Good workouts for developing inner and lower chest?
i have trouble developing the inner and lower part of my chest...do you have any suggestions? i have a bench press (flat and incline), dumbbells and an e-z curl bar....
this is a good workout for your lower part of your chest:

http://www.exrx.net/WeightExercises/Serr...

in the human body there is really no exercises that isolate the inner pectoral