K. Iracki,International Federation for Information Processing,IFIP Conference on Optimization Techniques.IFIP Conference on Optimization Techniques (9th : 1979 : Warsaw)：Optimization techniques．pt. 2.Springer,1980.
K. Iracki,International Federation for Information Processing,IFIP Conference on Optimization Techniques.IFIP Conference on Optimization Techniques (9th : 1979 : Warsaw)：Optimization techniques．pt. 1.Springer,1980.
