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Reports on Mathematical Physics > 2014 > 74 > 2 > 221-234
Reports on Mathematical Physics > 2013 > 71 > 2 > 217-229
Annals of Physics > 2010 > 325 > 2 > 373-383
Computer Physics Communications > 1998 > 113 > 2-3 > 220-238
Computer Physics Communications > 1997 > 105 > 2-3 > 263-272
Computer Physics Communications > 1997 > 105 > 2-3 > 273-283