@article {bilge1995time,
	title = {A time window approach to simultaneous scheduling of machines and material handling system in an FMS},
	journal = {Operations Research},
	volume = {43},
	number = {6},
	year = {1995},
	pages = {1058{\textendash}1070},
	publisher = {INFORMS},
	author = {{\"U}mit Bilge and Ulusoy, G{\"u}nd{\"u}z}
}
