On conformally covariant spin 3/2 and spin 2 equationsLoide, Rein-KarlJournal of physics. A. Mathematical and general1986 / p. 827-829 https://www.ester.ee/record=b2318274*est https://iopscience.iop.org/article/10.1088/0305-4470/19/5/037/pdf