Kamil Iskra G. Dick van Albada Peter M. A. Sloot Towards Grid-Aware Time Warp. 63-70 2004 conf/pads/2004 PADS http://csdl.computer.org/comp/proceedings/pads/2004/2111/00/21110063abs.htm db/conf/pads/pads2004.html#IskraAS04