with Maekivi, N. , ture, 'Semiotic dimensions of human attitudes towards other animals: a case of zoological gardens', Sign systems studies 44 (1-2), 209-230.
, tics, 'John Maynard Smith's typology of animal signals: a view from semiotics', Sign systems studies 37 (3-4), 477-495.
with Võsu, E. , ance, 'Introduction', Sign systems studies 38 (1-4), 9-17.
, 2018, 'Two decades of ecosemiotics in Tartu', Sign systems studies 46 (4), 630-639.
, 2017, Mimicry and meaning: structure and semiotics of biological mimicry, Springer, Dordrecht.
with Kull, K. , 2013, 'Journals of semiotics in the world', Sign systems studies 41 (1), 140-145.
, 2013, 'Enchantment of the past and semiocide. remembering Ivar Puura', Sign systems studies 41 (1), 146-149.
with Kull, K. , Lotman, M. , Salupere, S. , Torop, P. , 2011, 'Editors' comment', Sign systems studies 39 (2-4), 9-11.
, 2010a, 'Semiotic modeling of mimicry with reference to brood parasitism', Sign systems studies 38 (1-4), 349-376.
, 2010b, 'Семиотическое моделирование мимикрии на примере гнездового паразитизма. Резюме', Sign systems studies 38 (1-4), 376-377.
, 2007a, 'Towards an integrated methodology of ecosemiotics: the concept of nature-text', Sign systems studies 35 (1-2), 269-293.
, 2007b, 'К проблеме синтеза методологии экосемиотики: понятие текста природы. Резюме', Sign systems studies 35 (1-2), 293-294.
with Magnus, R. , Kull, K. , 2004, 'Jakob von Uexküll centre, since 1993', Sign systems studies 32 (1-2), 375-378.
, 2003, 'Mimesis as a phenomenon of semiotic communication', Sign systems studies 31 (1), 191-215.
, 2001a, 'Mimicry: towards a semiotic lmderstanding of nature', Sign systems studies 29 (1), 325-338.