Analogies between differential equations: Singular solutions of difference equations of Clairaut's type.
Clairaut's equations of higher order.
Additions to Kamke's treatise VI: A nonlinear second order equation.
On nonlinear superposition, III.
On some classes of linear equations, II.
Complete integrals of a class of linear homogenous partial differential equations.
Notes on partial differential equations III: Two Dirichlet type problems for Poisson's equation.
On some classes of linear equations.
A remark on a generalization of monotonic sequences.
Some inequalities for special functions.
Inequalities related to majorization of vectors.
Second order nonlinear differential equations equivalent to linear differential equations.
On the convergence of certain sequences, V.
Oscillating solutions of linear differential equations.
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