You can find copy of two publications in following: 1990: Farhood Pouryoussefi, The American Mathematical Monthly, Mathematical Association of America Publishing, USA, March 1990. Page 240, E3377, proposed elementary problem. 
1989: Farhood Pouryoussefi, Mathematics Magazine, Mathematical Association of America Publishing, USA, December 1989. Page 323, Proof without Words. Cited in: ALSINA, C. and NELSEN, R. B. (2010) An Invitation to Proofs Without Words. European Journal of Pure and Applied Mathematics.Vol. 3, No. 1, pp. 118-127.  |
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