Electronic Resource
Wisniewski, A.
;
Puzniak, R.
;
Gutowski, M.
;
[et al.]
Baran, M.
;
Szymczak, H.
;
Jingrong, W.
;
Pingxiang, Z.
;
Ping, J.
;
Keguang, W.
;
Lian, Z.
Amsterdam
:
Elsevier
Physica C: Superconductivity and its applications
185-189 (1991), S. 2503-2504