The STA11 direct-drive linear actuator allows the mounting of multiple units on 28-mm centers, permitting a 10-actuator assembly less than 12 in. wide. This addition to Copley Controls' ServoTube line ...
Proceedings of the National Academy of Sciences of the United States of America, Vol. 14, No. 12 (Dec. 15, 1928), pp. 911-914 (4 pages) ...
Measure and Integral, Banach and Hilbert Space, Linear Integral Equations. By Prof. Adriaan Cornelis Zaanen. (Bibliotheca Mathematica: a Series of Monographs on Pure and Applied Mathematics. Volume 2.