By Riggle J.D.   Stough R.R.   in Technological Forecasting and Social Change

ISSN:0040-1625|70|7|639-651

Elsevier‎(2003)‎

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By Kulkarni R.G.   Stough R.R.   Haynes K.E.   in Transportation Research Part C: Emerging Technologies

ISSN:0968-090X|4|6|407-424

Elsevier‎(1996)‎

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