Jay Alameda Marcus Christie Geoffrey Fox Joe Futrelle Dennis Gannon Mihael Hategan Gopi Kandaswamy Gregor von Laszewski Mehmet A. Nacar Marlon E. Pierce Eric Roberts Charles Severance Mary Thomas The Open Grid Computing Environments collaboration: portlets and services for science gateways. 921-942 2007 19 Concurrency and Computation: Practice and Experience 6 http://dx.doi.org/10.1002/cpe.1078 db/journals/concurrency/concurrency19.html#AlamedaCFFGHKLNPRST07