Problems for Solution: E54-E59

Autor: Hill, P. R., Rosenbaum, J., Dunkel, Otto, Cheney,, W. F., Sutton, R. M., Butchart, J. H.
Zdroj: The American Mathematical Monthly, 1933 Oct 01. 40(8), 491-492.
Databáze: JSTOR Journals