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Consumer survey
Poapst, James V., (1964)
Engel's law revisited
Perthel, D., (1975)
Une analyse de budget de famille par composantes principales
Cramer, Jan Salomon, (1966)
Empirical preference orderings and applied demand analysis
Maks, Johannes A. H., (1980)
Neo-Austrian, industrial and ordo-Austrian competition policy
Maks, Johannes A. H., (2003)
Neo-Austrian, industrial and Ordo-Austrian competition policy
Maks, Johannes A. H., (2005)