NIELSEN, Erik B. Remarks on the symmetric space $\mathrm{Sp}_2(H)/U(H)$ and its quatization. Mathematica Scandinavica, Berkeley, CA, United States, v. 73, p. 190–196, 1993. DOI: 10.7146/math.scand.a-12464. Disponível em: https://journals.msp.org/mscand/article/view/1202. Acesso em: 24 jul. 2026.