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Mathematical NotesHartmanis, J.; Stearns, R. E.; Mukhopadhyay, S. N.; Chaudhuri, Jyoti; Johnson, H. H.; Lebensold, Kenneth; Tucker, Joe; Keiser, V. H.; Hardman, N. R.; Jordan, J. H.; Hirsch, Guy; Kripke, Bernard; Fulton, C. M.; Blundon, W. J.; Hanson, J. R.; Machuca, Raul; Szüsz, P. · The American Mathematical Monthly · 1967