@article{1256049423, author = {Putnam, C. R.}, title = {Peak sets and subnormal operators}, journal = {Illinois J. Math.}, volume = {21}, number = {4}, year = {1977}, pages = { 388-394}, language = {en}, url = {http://dml.mathdoc.fr/item/1256049423} }
Putnam, C. R. Peak sets and subnormal operators. Illinois J. Math., Tome 21 (1977) no. 4, pp. 388-394. http://gdmltest.u-ga.fr/item/1256049423/