Simultaneous representations in discrete structures Věra Trnková (1986) Commentationes Mathematicae Universitatis Carolinae
Stability of algebraic inverse systems, I: Stability, weak stability and the weakly-stable socle Timothy Porter (1978) Fundamenta Mathematicae
Strong embeddings into categories of algebras over a monad. I. Jiří Rosický (1973) Commentationes Mathematicae Universitatis Carolinae
Strong embeddings into categories of algebras over a monad. II. Jiří Rosický (1974) Commentationes Mathematicae Universitatis Carolinae