Otto Blumenthal (1876--1944) in retrospect
J. Approx. Theory 138 (2006), no. 1, 1--36.
BibTex references
@Article\{BV06,
author = "Butzer, Paul and Volkmann, Lutz",
title = "Otto Blumenthal (1876--1944) in retrospect",
journal = "J. Approx. Theory",
number = "1",
volume = "138",
pages = "1--36",
year = "2006",
}