@phdthesis{Ostlin01a,
	author	=	{Anna \"Ostlin},
	title	=	{Constructing Evolutionary Trees --Algorithms
			and complexity},
	month	=	{June},
	number	=	{17},
	school	=	{Department of Computer Science, Lund
			University},
	ISBN	=	{91-628-4772-4},
	ISSN	=	{1650-1268},
	URL	=	{http://www.it-c.dk/people/annao/Constructing_Evolutionary_Trees.html}
}