You-Nian Wang ; Teng-Cai Ma Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms.
80-81
(1993)
- p.
16-19
,
1993
You-Nian Wang ; Teng-Cai Ma Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms.
51
(1990)
3
- p.
216-218
,
1990