Francine F. Abeles
The historical sources of tree graphs and the tree method in the work of Peirce and Gentzen
with Anellis Irving H.
in: Modern logic 1850-1950, East and West, Basel : Birkhäuser
Hugh MacColl and Lewis Carroll: crosscurrents in geometry and logic
with Moktefi Amirouche
Philosophia Scientiae 15/1