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Norsk Skipsfart under krig og hykonjunktur 1914 - 1920
Schreiner, Johan, (1963)
Handelskrigen 1939-40
Ørvik, Nils, (1953)
Die deutsche Handelsflotte 1939 - 1945 : unter besonderer Berücksichtigung der Blockadebrecher
Dinklage, Ludwig, (1971)
The Theory of Max-Min and its Application to Weapons Allocation Problems
Danskin, John M., (1967)
The theory of Max-Min and its application to weapons allocation problems