@article {3933,
	title = {Modeling Long-Running Activities as Nested Sagas},
	journal = {IEEE Data Engineering Bulletin},
	volume = {14},
	year = {1991},
	pages = {14--18},
	url = {http://sites.computer.org/debull/91MAR-CD.pdf},
	author = {Hector Garcia-Molina and Dieter Gawlick and Johannes Klein and Karl Kleissner and Ken Salem}
}
