NILESEN, B. P. D.; STETKAER, H. Invariant Fourier Integral Operators on Lie Groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 35, p. 193–210, 1974. DOI: 10.7146/math.scand.a-11546. Disponível em: https://www.mscand.dk/article/view/11546. Acesso em: 4 may. 2024.