1. Harry Bateman and Arthur Erdélyi, Higher Transcendental Functions. Vol. 2, McGraw-Hill, 1954.
2. Louis Boutet de Monvel and Victor Guillemin, The Spectral Theory of Toeplitz Operators. Priceton University Press, 1985.
3. Boo Rim Choe and Young Joo Lee, Commuting Toeplitz operators on the harmonic Bergman space. Michigan Math. J. 46 (1999), no. 1, 163–174.
4. L.A. Coburn, The C*-algebra generated by an isometry. Bull. Amer. Math. Soc. 73 (1967), 722–726.
5. L.A. Coburn, The C*-algebra generated by an isometry. II. Trans. Amer.Math. Soc. 137 (1969), 211–217.