SKOVHUS POULSEN, Niels. On the Canonical Commutation Relations. MATHEMATICA SCANDINAVICA, [S. l.], v. 32, p. 112–122, 1973. DOI: 10.7146/math.scand.a-11448. Disponível em: https://tidsskrift.dk/math/article/view/11448. Acesso em: 13 aug. 2026.