@Misc{ lema, author = { Lemenant, Antoine }, title = { A presentation of the average distance minimizing problem }, journal = { Zap. Nauchn. Sem. S.-Peterburg. Otdel. Mat. Inst. Steklov. (POMI) }, year = { 2011 }, pages = { }, URL = { http://cvgmt.sns.it/paper/1393/ }, note = { cvgmt preprint} }