Yulin, Cheng ; Junying, Lin ; Jiong, Zhang... Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms.
71
(1992)
4
- p.
457-460
,
1992
Yulin Cheng ; Junying Lin ; Bufa Zhang... Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms.
52
(1990)
1
- p.
68-71
,
1990