Saeco Minuto HD8761-HD8764 Instructions for Use
Phillips
German Wikibook
Various
Dackelblick
Frauke Scheunemann
Der Schattengänger
Monika Feth
Circuit Analysis, Theory and Practice, 5th Edition
Allan H. Robbins & Wilhelm C. Miller
Circuit Analysis with Devices, Theory and Practice, 3rd Edition
Allan H. Robbins