Electronic Resource
Grütter, P.
;
Rugar, D.
;
Mamin, H. J.
;
[et al.]
Castillo, G.
;
Lambert, S. E.
;
Lin, C.-J.
;
Valletta, R. M.
;
Wolter, O.
;
Bayer, T.
;
Greschner, J.
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
57 (1990), S. 1820-1822