References
Michael Zakharyaschev
Mathematical problems from applied logic I: logics for the XXIst century2006
with Gabbay Dov M., Goncharov Sergei (ed)
Dordrecht, Springer
Mathematical problems from applied logic I: logics for the XXIst century2006
with Gabbay Dov M., Goncharov Sergei (ed)
Dordrecht, Springer