@incollection{Santos,
author    =	"Santos, I F.",
title	 =	"{{A}ctive {T}ilting {P}ad {B}earings - {T}heory and {E}xperiment}",
booktitle =	"{VDI} Fortschritt--Berichte",
volume = "189"	,
series	=	"Reihe 11: Schwinsgungtechnik",
publisher =	"VDI Verlag",
year	  =	1993}