[141] (with A. P. Calderรณn) โA note on the interpolation of linearoperationsโ, SM 12 (1951), 194โ204. -- [142] โPolish mathematics between the two wars (1919โ39)โ, in: Proceedings of the Second Canadian Mathematical Congress, Vancouver,1949, pp. 3โ9, Univ. of Toronto Press, 1951. -- [143] (with A. P. Calderรณn) โOn the existence of certain singular integralsโ, Acta Math. 88 (1952), 85โ139. -- [148] (with R. Salem) โSome properties of trigonometric series whose terms have random signsโ, Acta Math. 91 (1954), 245โ301. -- [150] (with A. P. Calderรณn) โSingular integrals and periodic functionsโ, SM 14 (1954), 249โ271. -- [151] (with R. Salem) โSur un thรฉorรจme de Piatetรงki-Shapiroโ, CRAS 240 (1955), 2040โ2042. -- [153] (with A. P. Calderรณn) โOn a problem of Mihlinโ,TAMS 78(1955), 209โ224. -- [164] (with A. P. Calderรณn) โAddenda to the paper โOn a problem ofMihlinโโ, ibid., 84 (1957), 559โ560. -- [155] (with A. P. Calderรณn) โA note on the interpolation of sublinearoperationsโ, Amer. J. Math. 78 (1956), 282โ288. -- [156] (with A. P. Calderรณn) โOn singular integralsโ, ibid., 289โ309. -- [157] (with A. P. Calderรณn) โAlgebras of certain singular operatorsโ,ibid., 310โ320. -- [158] โOn a theorem of Marcinkiewicz concerning interpolation of operationsโ, J. Math.Pures Appl. (9) 35 (1956), 223โ248. -- [159] โHilbert transforms in Enโ, in: Proceedings of the InternationalCongress of Mathematicians, 1954, Amsterdam, Vol. 3, pp. 140โ151, Erven P. Noordhoff N.V., Groningen, and North-HollandPublishing Co., Amsterdam, 1956. -- [160] โOn the Littlewood-Paley function g*(?)โ,Proc. Nat. Acad. Sci.U.S.A. 42 (1956), 208โ212. -- [162] (with A. P. Calderรณn) โSingular integral operators and differential equationsโ, Amer. J. Math. 79 (1957), 901โ921. -- [166] (with M. Weiss) โA note on smooth functionsโ, Nederl.Akad.Weiensch. Proc. Ser. A 62 = Indag. Math. 21 (1959), 52โ58. -- [174] (with A. P. Calderรณn) โLocal properties of solutions of ellipticpartial differential equationsโ, SM 20 (1961), 171โ225. -- [179] (with E. M. Stein) โOn the differentiability of functionsโ, ibid.,23 (1963/1964), 247โ283. -- [180] (with A. P. Calderรณn) โOn the higher gradients of harmonicfunctionsโ, ibid., 24 (1964), 211โ226. -- [182] (with E. M. Stein) โOn the fractional differentiability of functionsโ, Proc. London Math. Soc. (3) 14A (1965), 249โ264. -- [187] (with E. M. Stein) โBoundedness of translation invariant operators on Hรถlder spaces and LpAspacesโ, Ann. of Math. (2) 85 (1967), 337โ349. -- [192] (with M. Weiss) โOn multipliers preserving convergence of trigonometric series almost everywhereโ, SM 30 (1968), 111โ120. -- [196] โOn certain lemmas of Marcinkiewicz and Carlesonโ, J. Approx. Theory 2 (1969), 249โ257. -- [202] โA Cantor-Lebesgue theorem for double trigonometric seriesโ, SM 43 (1972), 173โ178. -- [212] (with A. P. Calderรณn) โA note on singular integralsโ, ibid., 65 (1979), 77โ87

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