P.C. Gilmore and R.E. Gomory.
Sequencing a one state-variable machine: A solvable case of the
traveling salesman problem.
Oper. Res., 12:655-679, 1964.
S.S. Reddi and C.V. Ramamoorthy.
On the flow-shop sequencing problem with no wait in process.
Operational Res. Quart., 23:323-331, 1972.
Some new results in flow shop scheduling.
Z. Oper. Res. Ser. A-B, 28(1):1-16, 1984.
The three-machine no-wait flow shop is NP-complete.
J. Assoc. Comput. Mach., 31(2):336-345, 1984.
WWW daemon apache