@article {1989, title = {Surfaces of minimal area enclosing a given body in R\\\\sp 3.}, journal = {Ann. Scuola Norm. Sup. Pisa Cl. Sci. (4) 16 (1989), no. 3, 331--354 (1990).}, number = {SISSA;23/88/M}, year = {1989}, publisher = {SISSA Library}, url = {http://hdl.handle.net/1963/619}, author = {Giovanni Mancini and Roberta Musina} }