1
Journal of physics. A. Mathematical and general
ZB; Vol. 8. 1975 - Vol. 37. 2004
IKP; Vol. 8. 1975 - Vol. 9. 1976
“...00223689...”ZB; Vol. 8. 1975 - Vol. 37. 2004
IKP; Vol. 8. 1975 - Vol. 9. 1976
2
3