Lipschitz Spaces and Exponentially Integrable Functions C. Neugebauer Indiana University Mathematics Journal 1974 text pdf 10.1512/iumj.1974.23.23008 10.1512/iumj.1974.23.23008 en Indiana Univ. Math. J. 23 (1974) 103 - 106 state-of-the-art mathematics http://iumj.org/access/