@article{oai:ir.soken.ac.jp:00003340,
 author = {湯川, 哲之 and YUKAWA, Tetsuyuki},
 issue = {17},
 journal = {Physical Review Letters, Physical Review Letters},
 month = {Apr},
 note = {The joint distribution of energy eigenvalues of a Hamiltonian is derived by means of the usual statistical laws of classical many-body systems. It makes a transition from the Poisson type to the Gaussian type depending on the value of a single parameter characteristic of the Hamiltonian.},
 pages = {1883--1886},
 title = {New approach to the statistical properties of energy levels},
 volume = {54},
 year = {1985}
}