MathSciNet bibliographic data MR2351135 (2009c:41003) 41A05 (41A45 47B38) Fefferman, Charles The structure of linear extension operators for \$C\sp m\$$C\sp m$. Rev. Mat. Iberoam. 23 (2007), no. 1, 269–280. Article

For users without a MathSciNet license , Relay Station allows linking from MR numbers in online mathematical literature directly to electronic journals and original articles. Subscribers receive the added value of full MathSciNet reviews.