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Author: Hsieh, Po Fang

• Hsieh, Po Fang: On asymptotic integrations of $x^2y''-P(x)y=0$. (English). Archivum Mathematicum, vol. 14 (1978), issue 2, pp. 75-83
• Hsieh, Po Fang: On a reduction of nonlinear ordinary differential equations at an irregular type singularity. (English). Archivum Mathematicum, vol. 10 (1974), issue 3, pp. 129-147