The method suggested by Balian and Br\'ezin for treating angular momentum reduction in the Faddeev equations is shown to be applicable to the relativistic three-body problem.
Form factors of hadronic systems in various forms of relativistic quantum mechanics
Form factors in relativistic quantum mechanics: Is there a favored approach? Why?
Properties of few-body systems in relativistic quantum mechanics and constraints from transformations under Poincaré space-time translations
