I read a Frederic Delavier’s book « Strength Training Anatomy » and there is good stuff.
Standing with your legs apart and flexed. Your torso bent forward with your back straight. A dumbbell in each hand with elbows slightly bent :
Inhale and raise until to the horizontal
Exhale when you return to the start position
This exercise work the whole of shoulders accentuating the work of the deltoid’s posterior beams of the. If you tighten your shoulder blades at the end of movement, you use trapezius (middle and inferior fibers), rhomboid, teres major and infraspinatus.
It’s possible to do this exercise lying face down on an incline bench.
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