@article {2002,
	title = {On the K+P problem for a three-level quantum system: optimality implies resonance},
	journal = {J.Dynam. Control Systems 8 (2002),no.4, 547},
	number = {SISSA;30/2002/M},
	year = {2002},
	publisher = {SISSA Library},
	doi = {10.1023/A:1020767419671},
	url = {http://hdl.handle.net/1963/1601},
	author = {Ugo Boscain and Thomas Chambrion and Jean-Paul Gauthier}
}
