Problem Posing in Mathematics: Reflecting on the Past, Energizing the Present, and Foreshadowing the Future
1970 ◽
Vol 3
(1)
◽
pp. 18-24
2004 ◽
Vol 16
(06)
◽
pp. 251-253
2017 ◽
Vol 58
(1)
◽
pp. 20-29
◽