1. Clunie, J., On integral and meromorphic functions, J. London Math. Soc. 37 (1962), 17–27.
2. Gromak, V. I., The first-higher order Painlevé equation, Differ. Equations 35 (1999), 37–41.
3. Laine, I., Nevanlinna theory and complex differential equations, W. de Gruyter, Berlin-New York, 1993.
4. Li, Y. Z. and Yuan, W. J., On analytic properties of (4P1)-higher order analogue of the first Painlevé equation, to appear.
5. Mohon’ko, A. Z. and Mohon’ko, V. D., Estimates of the Nevanlinna charateristics of certain classes of meromorphic functions and their applications to differential equations, Sibirsk Mat. Zh. 15 (1974), 1305–1322. (Russian)