• [1] E. L. Ince, Ordinary Differential Equations, London, 1927.
• [2] George Pólya and Norbert Wiener, On the oscillation of the derivatives of a periodic function, Trans. Amer. Math. Soc. 52 (1942), 249–256. MR 0007169, https://doi.org/10.1090/S0002-9947-1942-0007169-X
• [3] L. Schlesinger, Handbuch der Theorie der linearen Differentialgleichungen, Leipzig, vol. I, 1895, vol. II, 1897, vol. II, 1898.
• [4] G. Szegö, On the oscillation of differential transforms. I, Trans. Amer. Math. Soc. 52 (1942), 450–462. MR 0007170, https://doi.org/10.1090/S0002-9947-1942-0007170-6
• [5] -, Orthogonal Polynomials, American Mathematical Society Colloquium Publications, New York, vol. 23, 1939.
• [6] E. T. Whittaker and G. N. Watson, A Course in Modern Analysis, 4th edition, Cambridge, 1935.

Bibliography

[1]

E. L. Ince, Ordinary Differential Equations, London, 1927.

[2]

G. Pólya and N. Wiener, On the oscillation of the derivatives of a periodic function, these Transactions, vol. 52 (1942), pp. 249-256. MR 0007169 (4:97a)

[3]

L. Schlesinger, Handbuch der Theorie der linearen Differentialgleichungen, Leipzig, vol. I, 1895, vol. II, 1897, vol. II, 1898.

[4]

G. Szegö, On the oscillation of differential transforms. I, these Transactions, vol. 52 (1942), pp. 450-462. MR 0007170 (4:97b)

[5]

-, Orthogonal Polynomials, American Mathematical Society Colloquium Publications, New York, vol. 23, 1939.

[6]

E. T. Whittaker and G. N. Watson, A Course in Modern Analysis, 4th edition, Cambridge, 1935.