@article{10_4064_sm_100_1_87_94,
     author = {A. J. Pryde},
     title = {Inequalities for exponentials in {Banach} algebras},
     journal = {Studia Mathematica},
     pages = {87--94},
     publisher = {mathdoc},
     volume = {100},
     number = {1},
     year = {1991},
     doi = {10.4064/sm-100-1-87-94},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-100-1-87-94/}
}