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2. M. Weyl, Gruppentheorie und Quantenmechanik”, Hirzel, Leipzig: 1st ed., 1928; 2nd ed., 1931, translated as “The Theory of Groups and Quantum Mechanics”, by M.P. Robertson, Methuen, London, 1931; reissued Dover, New York, 1949.
3. A Young, Quantitative Substitut!onal Analysis, PLMS (1), I, 33 (1901); 97–146.
4. A Young, Quantitative Substitut!onal Analysis, PLMS (1) II, 34 (1901), 361–397.
5. A Young, Quantitative Substitut!onal Analysis, PLMS (2) III, 28 (1928), 255–292.