@Article{ stetil00, author = { Stepanov, Eugene and Tilli, Paolo }, title = { On the Dirichlet problem with several volume constraints on the level sets }, journal = { Proc. Royal Soc. Edinburgh - Ser. A. (Mathematics) }, year = { 2002 }, volume = { 132 }, number = { 2 }, pages = { 437-461 }, URL = { http://cvgmt.sns.it/paper/1358/ }, note = { cvgmt preprint} }