Another paper of major importance which Lewy published in 1951 was On minimal surfaces with partially free boundary which examines the continuation of minimal surfaces across analytic boundary arcs.
Ibang papel ng malaking kahalagahan na Lewy inilathala sa 1951 ay minimal Sa ibabaw na may bahagyang libreng boundary na kung saan ang ang pagpapatuloy ng mga minimal ibabaw sa lahat ng boundary analytic arcs.