Electronic Resource
Barth, M.
;
Clercq, C.
;
Wolf, E. A.
;
[et al.]
Dumont, J. J.
;
Johnson, D. P.
;
Lemonne, J.
;
Peeters, P.
;
Drevermann, H.
;
Goldschmidt-Clermont, Y.
;
Harigel, G.
;
Milstene, C.
;
Porte, J. P.
;
Ross, R. T.
;
Spyropoulou-Stassinaka, M.
;
Squarcia, S.
;
Theocharopoulos, P.
;
... and further 9
Springer
The European physical journal
11 (1981), S. 271-271