Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Hammer, P. L.","Pseudo-Boolean programming and applications : presented at the Colloquium on Mathematics and Cybernetics in the Economy, Berlin, October 1964",,Springer-Verlag,1965,Lecture notes in mathematics,,,,https://cir.nii.ac.jp/crid/1130282271336282880