Chidanand Apté, Fred Damerau, et al.
ACM Transactions on Information Systems (TOIS)
The problem of deciding whether a given rotational lattice L has a vector of length less than some given value r is shown to be NP-hard. This problem is even under the premise that L has exactly zero or one vector of length less than r. The premise is also under randomized conditions.
Chidanand Apté, Fred Damerau, et al.
ACM Transactions on Information Systems (TOIS)
Hans Becker, Frank Schmidt, et al.
Photomask and Next-Generation Lithography Mask Technology 2004
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
Gal Badishi, Idit Keidar, et al.
IEEE TDSC