Geodesic
Uniform Estimates for Positive Solutions of Higher Order Quasilinear Differential Equations
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Differential equations and dynamical systems, Tome 261 (2008), pp. 26-36.

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For a higher order quasilinear differential equation, the existence of uniform estimates for positive solutions with common domain of definition is proved; these estimates depend on the estimates for the coefficients of the equation and do not depend on the coefficients themselves. 
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I. V. Astashova. Uniform Estimates for Positive Solutions of Higher Order Quasilinear Differential Equations. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Differential equations and dynamical systems, Tome 261 (2008), pp. 26-36. http://geodesic.mathdoc.fr/item/TM_2008_261_a2/

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