@article {jopera:40,
title = {Modeling and Executing Heterogeneous Grid Workflows with JOpera},
author = {Cesare Pautasso and Thomas Heinis},
year = {2005},
month = {5.10.2005},
address = {GGF 15, Boston, USA},
URL = {http://www.isi.edu/~deelman/wfm-rg/},
}