Bedirhan Urgun Curtis E. Dyreson Richard T. Snodgrass Jessica K. Miller Nick Kline Michael D. Soo Christian S. Jensen Integrating multiple calendars using tau-ZAMAN. 267-308 2007 37 Softw., Pract. Exper. 3 http://dx.doi.org/10.1002/spe.765 db/journals/spe/spe37.html#UrgunDSMKSJ07