Lenz, D., Weinmann, T., &; Wirth, M. (2021). Self-adjoint extensions of bipartite Hamiltonians. Proceedings of the Edinburgh Mathematical Society. Cambridge University Press.https://doi.org/10.1017/S0013091521000080 
LibreCat: https://research-explorer.ista.ac.at/record/9627
DOI: 10.1017/S0013091521000080
WoS: 000721363700003
arXiv: 1912.03670