'Umwelt ethics' - further teaching, and another reference

My 2003 article Umwelt ethics was part of the compulsary literature for the 2005/2006 seminar Seminar zur Geschichte der Biologie: Ethik, Erkenntnis, Naturwissenschaft. Geschichte und post-moderne Rezeption der Umweltkonzeption Jakob von Uexkülls (Torstein Rüting, starting November 1st, 2005) at Universität Hamburg. It now appears that the seminar was repeated in the summer semester of 2006 (seminar starting April 4th, 2006), with an identical reading list.

Furthermore, as I just discovered, Timo Maran, my fellow Tartu semiotician, refers to my article in 'Where do your borders lie? Reflections on the semiotical ethics of nature', which was published (pgs. 455-476) in Nature in Literary and Cultural Studies: Transatlantic Conversations on Ecocriticism (eds. Catrin Gersdorf, Sylvia Mayer - Amsterdam/New York 2006: Rodopi). On pg. 467 (footnote 11), he writes:

"Seeing ourselves as intertwined with our environments, surroundings and contexts by meaning relations should also lead us to consider our fellow humans on the same premisses. As shown by Morten Tønnessen, this in its turn may bring along the need to consider ethically also higher semiotic structures, such as habitats, populations, cultures, with which other subjects are related (Tønnessen 2003: 291-2)."

This is to my knowledge the sixth academic reference to my work (2002x2, 2004, 2005, 2006, 2007) - whereof the third to 'Umwelt ethics' (2005, 2006, 2007).