### Sums of squares and ~~modular number theory~~

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[2] : “On Epstein’s zeta function,” Acta Arith. 9 : 4 (1964), pp. 365–373. Dedicated to Professor L. J. Mordell on the occasion of his seventy-fifth birthday. MR 0179141 Zbl 0128.27004 article

[3] : “Multiplicative arithmetic functions and the representation of integers as sums of squares,” pp. 9–13 in Proceedings of the 1972 number theory conference (Boulder, CO, 14–18 August 1972). University of Colorado, 1972. MR 0389830 Zbl 0323.10019 incollection

[4] : “Positive integers expressible as a sum of three squares in essentially only one way,” J. Number Theory 19 : 3 (December 1984), pp. 301–308. Dedicated to the memory of Ernst Straus (1922–1983) [misprinted on paper as “Strass”]. MR 769785 Zbl 0558.10038 article

[5] : “Integers expressible in a given number of ways as a sum of two squares,” pp. 37–45 in A tribute to Emil Grosswald: Number theory and related analysis. Edited by M. I. Knopp and M. Sheingorn. Contemporary Mathematics 143. American Mathematical Society (Providence, RI), 1993. Dedicated to the memory of Elizabeth and Emil Grosswald. MR 1210510 Zbl 0790.11032 incollection

[6] : “Sums of distinct squares,” Acta Arith. 67 : 4 (1994), pp. 349–380. MR 1301824 Zbl 0815.11048 article

[7] : “The asymptotic formula for the number of representations of an integer as a sum of five squares,” pp. 129–139 in Analytic number theory: Proceedings of a conference in honor of Heini Halberstam (Allerton Park, IL, 16–20 May 1995), vol. 1. Edited by B. C. Berndt, H. G. Diamond, and A. J. Hildebrand. Progress in Mathematics 138. Birkhäuser (Boston), 1996. Dedicated to Heini and Doreen Halberstam. MR 1399334 Zbl 0857.11019 incollection

[8] : “Some new old-fashioned modular identities,” Ramanujan J. 2 : 1–2 (1998), pp. 247–269. Dedicated to the memory of Paul Erdős. MR 1642881 Zbl 0909.11018 article

[9] : “Sums of squares and the preservation of modularity under congruence restrictions,” pp. 59–71 in Symbolic computation, number theory, special functions, physics and combinatorics (Gainesville, FL, 11–13 November 1999). Edited by F. G. Garvan and M. E. H. Ismail. Developments in Mathematics 4. Kluwer Academic (Dordrecht), 2001. MR 1880079 Zbl 1040.11018 incollection