[1] Bank S. A note on the zeros of solutions w´´− P(z)w = 0 where P is a polynomial. Appl Anal, 1987, 25: 29–41

[2] Bank S. A note on the location of complex zeros of solutions of linear differential equations. Complex Variables Theory Appl, 1989, 12: 159–167

[3] Bank S. On the complex zeros of solutions of linear differential equations. Ann Mat Pura Appl, 1992, 161: 83–112

[4] Br?uuggemann F. On the zeros of fundamental systems of linear differential equations with polynomial coefficients. Complex Variables Theory Appl, 1990, 15: 159–166

[5] Br?uuggemann F. On the solutions of linear differential equations with real zeros; proof of a conjecture of Hellerstein and Rossi. Proc Amer Math Soc, 1991, 113: 371–379

[6] Gao Lingyun. On the growth of solutions of higher-order algebraic differential equations. Acta Mathe-matica Scientia, 2002, 22(4): 459–465

[7] Gaudenzi M. On the number of zeros of solutions of a linear differential equation. J Math Anal Appl, 1998, 221(1): 306–325

[8] Gil' M I. Approximations of zeros of entire functions by zeros of polynomials. J of Approximation Theory, 2000, 106: 66–76

[9] Gil' M I. Perturbations of zeros of a class of entire functions. Complex Variables, 2000, 42: 97–106

[10] Gil' M I. Difference Equations in Normed Spaces//Stability and Oscillations: North-Holland, Mathematics Studies 206. Amsterdam: Elsevier, 2007

[11] Gil' M I. Localization and Perturbation of Zeros of Entire Functions. New York: CRC Press, Taylor and Francis Group, 2010

[12] Gil' M I. Bounds for zeros of solutions of second order differential equations with polynomial coefficients. Results in Math Online First, 2010

[13] Hellerstein S, Rossi J. Zeros of meromorphic solutions of second order linear differential equations. Math Z, 1986, 192: 603–612

[14] Hellerstein S, Rossi J. On the distribution of zeros of solutions of second-order differential equations. Complex Variables Theory Appl, 1989, 13: 99–109

[15] Hellerstein S, Rossi J. Schwarzian derivatives and zeros of solutions to second order linear differential equations. Proc Amer Math Soc, 1991, 113: 741–746

[16] Greenwood R E, Miller J J. Zeros of the Hermite polynomials and weights for Gauss' mechanical quadrature formula. Bull Am Math Soc, 1948, 54: 765–769

[17] Kudryashov N A, Demina M V. Relations Between Zeros of Special Polynomials Associated with the Painlev Equations. Phys Lett, 2007, 368A: 227–234

[18] Laine I. Nevanlinna Theory and Complex Differential Equations. Berlin: Walter de Gruyter, 1993

[19] Langley J K. Some oscillation theorems for higher order linear differential equations with entire coefficients of small growth. Result Math, 1991, 20: 517–529

[20] Lebedev N N. Special Functions and their Applications. New York: Dover Publ Inc, 1972

[21] Lin Chingher, Sibuya Yasutaka, Tabara Tatsuhiko. Zeros of solutions of a second order linear differential equation with polynomial coefficients. Funkc Ekvacioj, 1993, 36(2): 375–384

[22] Muminov G M. On the zeros of solutions of the differential equation !(2m) +p(z)! = 0. Demonstr Math, 2002, 35(1): 41–48

[23] Tu Jin, Chen Zongxuan. Zeros of solutions of certain second order linear differential equation. J Math Anal Appl, 2007, 332(1): 279–291

[24] Rossi J. The Tsuji characteristic and real zeros of second order ordinary differential equations. J London Math Soc, 1987, 36(2): 490–500

[25] Smith E R. Zeros of the Hermitian polynomials. Amer Math Monthly, 1936, 43: 354–358