with Kull, K. , 2015, On biosemiotics and its possible relevance to linguistics, in E. Velmezova, K. Kull & S. J. Cowley (eds.), Biosemiotic perspectives on language and linguistics, Dordrecht, Springer, pp. 13-28.
, 2009, Essential readings in biosemiotics: anthology and commentary, Springer, Dordrecht.
with Emmeche, C. , Hoffmeyer, J. , 2008, 'The IASS roundtable on biosemiotics: a discussion with some founders of the field', The American Journal of Semiotics 24 (1-3), 1-21.
, 2007, The evolutionary history of biosemiotics, in M. Barbieri (ed.), Introduction to biosemiotics, Dordrecht, Springer, pp. 1-68.
, 2005, 'Founding a world biosemiotics institution: the international society for biosemiotic studies', Sign systems studies 33 (2), 481-485.
, 2002a, 'Beyond self and other: on the neurosemiotic emergence of intersubjectivity', Sign systems studies 30 (1), 57-99.