(en) DeMarco, Megan. "Voters to decide whether to merge two Princetons into one", The Star-Ledger, 3 novembre 2011. Consulyé le 8 décembre 2017. "There are 22 sets of 'doughnut towns' in New Jersey, those where one town wraps around the other town". Note that following voter approval of the Princeton merger, 21 pairs of "doughnut towns" remain.