An Introduction to Context-free Text Grammars. - Andrzej Ehrenfeucht; Hendrik Jan Hoogeboom; Paulien ten Pas; Grzegorz Rozenberg (Developments in Language Theory, 1993)

Combinatorial Properties of Texts. - Andrzej Ehrenfeucht; Paulien ten Pas; Grzegorz Rozenberg (RAIRO Theor. Informatics Appl., 1993)

MSO Definable Text Languages. - Hendrik Jan Hoogeboom; Paulien ten Pas (MFCS, 1994)

Context-free Text Grammars. - Andrzej Ehrenfeucht; Paulien ten Pas; Grzegorz Rozenberg (Acta Informatica, 1994)

Properties of Grammatical Codes of Trees. - Andrzej Ehrenfeucht; Paulien ten Pas; Grzegorz Rozenberg (Theor. Comput. Sci., 1994)

Grammatical Codes of Trees and Terminally Coded Grammars. - Andrzej Ehrenfeucht; Joost Engelfriet; Paulien ten Pas; Grzegorz Rozenberg (Fundam. Informaticae, 1995)

Text Languages in an Algebraic Framework. - Hendrik Jan Hoogeboom; Paulien ten Pas (Fundam. Informaticae, 1996)

A Note on Binary Grammatical Codes of Trees. - Andrzej Ehrenfeucht; Paulien ten Pas; Grzegorz Rozenberg (Theor. Comput. Sci., 1996)

Monadic Second-Order Definable Text Languages. - Hendrik Jan Hoogeboom; Paulien ten Pas (Theory Comput. Syst., 1997)

Permutations, parenthesis words, and Schröder numbers. - Andrzej Ehrenfeucht; Tero Harju; Paulien ten Pas; Grzegorz Rozenberg (Discret. Math., 1998)