3 ms·

Two earlier papers on the topic: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2677606/pdf/rspb20090121.pdf http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2677606/p

by akeck 11y ago

Two earlier papers on the topic: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2677606/pdf/rspb20090121.pdf http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2677606/pdf/rspb... and http://www.indiana.edu/~psymodel/papers/BusWanTow06.pdf http://www.indiana.edu/~psymodel/papers/BusWanTow06.pdf