1. N. Bohr, Niels Bohr – Collected Works, vol. 3. The Correspondence Principle (1918–1923) (Elsevier/North-Holland, Amsterdam, 1976)
2. E. Cordero, M.A. de Gosson, F. Nicola, Semi-classical time-frequency analysis and applications. Math. Phys. Anal. Geom. 20(4) (2017). Paper No. 26, 23
3. G.B. Folland, Harmonic Analysis in Phase Space, vol. 122 (Princeton University Press, Princeton, 1989)
4. F. Nicola, Convergence in Lp for Feynman path integrals. Adv. Math. 294, 384–409 (2016)
5. D. Tataru, Phase space transforms and microlocal analysis, in Phase Space Analysis of Partial Differential Equations, vol. II (Scuola Normale Superiore, Pisa, 2004), pp. 505–524