@article{7bcd9bfddf5e4cbab69643dd34a40305,
title = "Invariant classification of vacuum pp-waves",
author = "R. Milson and D. McNutt and A. Coley",
note = "Funding Information: The authors would like to thank Georgios Papadopoulos for useful discussions. The research of R.M. and A.C. is supported, in part, by Natural Sciences and Engineering Research Council (Canada) (NSERC) discovery grants.",
year = "2013",
month = feb,
day = "5",
doi = "10.1063/1.4791691",
language = "English",
volume = "54",
journal = "Journal of Mathematical Physics",
issn = "0022-2488",
publisher = "American Institute of Physics Publising LLC",
number = "2",
}