The Riccati differential equation with complex-valued coefficients and application to the equation x ' ' + P ( t ) x ' + Q ( t ) x = 0 Zuzana Došlá (1982) Archivum Mathematicum Similarity:
Asymptotic behaviour of equations z ˙ = q ( t , z ) - p ( t ) z 2 and x ¨ = x ϕ ( t , x ˙ x - 1 ) Josef Kalas (1981) Archivum Mathematicum Similarity: