E. Lopez, A. Monzon, P. Christidis, P. Pfaffenbichler, S. Shepherd:
"Chapter 5: The assessment mothodology";
in: "STEPS - Transport strategies under the scarcity of energy supply", A. Monzon, A. Nuijten (ed.); Buck Consultants International, The Hague, 2006, ISBN: 90-9020880-1, 71 - 78.
Project Head Günter Emberger:
STEPS