Celebratio Mathematica

P. T. Bate­man, A. J. Hildebrand, and G. B. Purdy: “Sums of dis­tinct squares,” Acta Arith. 67 : 4 (1994), pp. 349–​380. MR 1301824 Zbl 0815.​11048 article

P. T. Bate­man: “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