1. On a general convergence theorem, and the theory of the representation of a function by series of normal functions;Hobson,1908
2. On the representation of a function by a series of Legendre's functions;Hobson,1909
3. Zur Theorie der trigonometrischen Reihen und der Entwicklungen nach Kugelfunktionen;Burkhardt;Sitzungsberichte der Königlich, Bayerischen Akademie der Wissenschaften, Mathmatisch-physikalische Klasse, 39,1909
4. The Theory of Approximation;Jackson,1930
5. An estimate of the rate of convergence for Fourier series of functions of bounded Variation;Bojanic;Publ. Inst. Math. (Belgrade),1979