Amiranashvili, SBandelow, U.Akhmediev, Nail2015-12-13July 27-319781557528209http://hdl.handle.net/1885/76386Optical solitons cannot go beyond the critical single-cycle duration even for the most favorable medium dispersion. A universal feature that prohibits existence of too short solitons is an unavoidable formation of the singular cusp.20142015-12-11