@article {MR2046400,
	title = {Optimal control problem for {L}iapunov exponents of two-dimensional systems},
	journal = {Random Oper. Stochastic Equations},
	volume = {12},
	number = {1},
	year = {2004},
	pages = {11{\textendash}34},
	issn = {0926-6364},
	doi = {10.1163/156939704323067807},
	url = {http://db.lic.vnu.edu.vn:2080/10.1163/156939704323067807},
	author = {Nguyen Huu Du and Pham Van Quoc}
}
