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James T. Cross, The Euler φ-Function in the Gaussian Integers, The American Mathematical Monthly, Vol. 90, No. 8 (Oct., 1983), pp. 518-528 ...

Frank H. Knight, Profit and Entrepreneurial Functions, The Journal of Economic History, Vol. 2, Supplement: The Tasks of Economic History (Dec., 1942), pp. 126-132 ...

Read about the best motorcycle Bluetooth headsets as chosen by MCN. Whether you want to listen to music, make calls, or hear your sat nav, you need a good Bluetooth headset.

Trump hikes tariffs on Canada after trade talks stall US-Mexico-Canada pact will soften blow for a majority of Canadian goods.

With a hefty $2600-plus price tag, adding a Thermomix to your kitchen collection is no impulse buy. But is this machine for you?