1. Asche, F., Wessells, C.R., 2002. Demand Equations with Some Non-Stationary Variables: The Demand for Farmed and Wild Salmon in Japan. Working Paper, Institute for Research in Economics and Business Administration, Bergen.
2. Estimating a cointegrating demand system;Attfield;European Economic Review,1997
3. Balcombe, R., Mackett, R., Paulley, N., Preston, J., Shires, J., Titheridge, H., Wardman, M., White, P., 2004. The Demand for Public Transport: A Practical Guide, TRL Report, Crowthorne, UK.
4. A maximum likelihood procedure for regression with autocorrelated errors;Beach;Econometrica,1978
5. Understanding attitudes towards public transport and private car: a qualitative study;Beirão;Transport Policy,2007