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- [3] ORDINAL NUMBERS IN ARITHMETIC-PROGRESSION ZEITSCHRIFT FUR MATHEMATISCHE LOGIK UND GRUNDLAGEN DER MATHEMATIK, 1992, 38 (5-6): : 525 - 528
- [4] DIVISORS OF INTEGERS IN ARITHMETIC-PROGRESSION CANADIAN MATHEMATICAL BULLETIN-BULLETIN CANADIEN DE MATHEMATIQUES, 1990, 33 (02): : 129 - 134
- [9] THE AVERAGE NUMBER OF DIVISORS IN AN ARITHMETIC-PROGRESSION CANADIAN MATHEMATICAL BULLETIN-BULLETIN CANADIEN DE MATHEMATIQUES, 1981, 24 (01): : 37 - 41