NILESEN, Borge P. D.; STETKAER, H. Invariant Fourier Integral Operators on Lie Groups. Mathematica Scandinavica, Berkeley, CA, United States, v. 35, p. 193–210, 1974. DOI: 10.7146/math.scand.a-11546. Disponível em: https://journals.msp.org/mscand/article/view/2103. Acesso em: 25 jul. 2026.