@MISC{LOPBAN_4.MIZ,
  AUTHOR = {Shidama, Yasunari},
  TITLE = {The Exponential Function on {B}anach Algebra},
  DAY = {13},
  MONTH = {February},
  YEAR = {2004},
  ADDRESS1 = {Shinshu University\\Nagano},
  SUMMARY = {In this article, the basic properties of the exponential 
  function on Banach algebra are described.}}

