Publication
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January 1962
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Topological semigroups, 1 Tech Report
January 1962 -
On commutativity of transformations Tech Report
January 1962 -
Cylinderalgebra's Tech Report
January 1962 -
January 1962
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January 1962
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A case of colouration in the four-colourproblem Tech Report
January 1962 -
Toepassingen van een lineariseringsprincipe Tech Report
January 1962