MathSciNet bibliographic data MR460295 (57 #289) 12D15 Becker, Eberhard Hereditarily Pythagorean fields, infinite Harrison-primes and sums of \$2\sp{n}\$$2\sp{n}$th powers. Bull. Amer. Math. Soc. 84 (1978), no. 2, 278–280. Article

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