DRĂGAN, Vasile, and Ioan-Lucian POPA. 2021. “A Spectral Criterion for the Existence of the Stabilizing Solution of a Class of Riccati Type Differential Equations With Periodic Coefficients”. Studia Universitatis Babeș-Bolyai Mathematica 66 (1):159-77. https://doi.org/10.24193/subbmath.2021.1.14.