Tönnies, Merle. “Becker, J.: Nicht-Ich-Identität. Ästhtische Subjektivität in Samuel Becketts Arbeiten Für Theater, Radio, Film Und Fernsehen, 1998.” Forum Modernes Theater, 1999.

Tönnies, Merle. “Ledger, S.: The New Woman. Fiction and Feminism at the ‘Fin de Siècle’, 1997.” Anglia, 1999.

Tönnies, Merle. Samuel Beckett’s Dramatic Strategy. Audience Laughter and the Postmodernist Debate. Trier: WVT, 1997.

Tönnies, Merle. “The Spectator as Participant: The Role of Integrating Audience Laughter in Samuel Beckett’s Drama.” Forum Modernes Theater 11, no. 2 (1996): 185–96.