1. “A critique of methods in hydrologic systems research.”;Amorocho;Transactions of American Geophysical union,1964
2. “Projective-geometric treatment of O. Lehmann's theory of the transformation of steep mountain slopes.”;Bakker;Koninklijke Nederlandsche Akademie van Wetenschappen,1946
3. “Theory on central rectilinear recession of slopes.”;Bakker;Koniklijke Nederlandsche Akademie van Wetenschappen,1947
4. “Theory on central rectilinear recession of slopes.”;Bakker;Koniklijke Nederlandsche Akademie van Wetenschappen,1950
5. “A remarkable new geomorphological law.”;Bakker;Koninklijke Nederlandsche Akademie van Wetenschappen,1952