4
Powell, John L.
| Addison-Wesley Pub. Co. |
1961
5
Fl?gge, Siegfried.
| Springer-Verlag |
1994
6
Sakurai, J. J.
| Benjamin/Cummings |
1985
7
Maslov, V. P.
| D. Reidel Pub. Co. |
1981
8
Shankar, Ramamurti.
| Plenum Press |
1980