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Submitted on : Thursday, June 4, 2009 - 4:52:43 PM Last modification on : Friday, June 5, 2009 - 11:18:26 PM Long-term archiving on: : Monday, October 15, 2012 - 11:46:35 AM
Detlef Müller. Local solvability of second order differential operators with double characteristics on Heisenberg groups. 3rd cycle. Monastir (Tunisie), 2005, pp.39. ⟨cel-00391785⟩