SayerR A, 1980“Urgent unreal and real nonurgent research: a reply to Simmonds”, Letter to the editor, Environment and Planning A12967–970
2.
SimmondsD C, 1980“A comment on the papers from the BSRSA Workshop on Regional Science Methods in Structure Planning”Environment and Planning A12463–467
3.
PitfieldD E, 1979“Algorithm 7: Obtaining shadow prices from the NAG transportation primal”Environment and Planning A111069–1078