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Transformer Learning Centre Learn more about Transformers and how they work

Inside Transformers from Denver University

Understanding Transformers: Characteristics and Limitations from Conformity Magazine

3 Phase Transformer Information and Construction — The 3 Phase Power Resource Site

DMOZ: Business: Electronics and Electrical: Substation and Transmission   Transformers for the Utility sector

Electronic Transformers types and structures

J.Edwards and T.K Saha, Power flow in transformers via the Poynting vector (PDF)

Electrical Engineering Fundamentals by J P Néal dept of Elec Eng, University of illinois. publ McGraw Hill 1960 Library of Congress No 59-13210. Sect 7-9 on mutual inductance , p301,