1970/67/3

On a certain property of the derivative

One-to-one continuous images of a line

Maximal chains in atomic Boolean algebras

On smooth dendroids

Über die Mächtigkeiten und Unabhängigkeitsgrade der Basen freier Algebren, II

Remarks on some class of continuous mappings of λ-dendroids

A fixed point theorem for continua which are hereditarily divisible by points

On the topology of curves I

A characterization of smoothness in dendroids