Forrsund FR (1993). “Productivity Growth in Norwegian Ferries.” in Fried HO and SS Schmidt (eds.) the Measurement of Productive Efficiency: Techniques and Applications Oxford U.K.: 352-373.
Forrsund FR (1993). “Productivity Growth in Norwegian Ferries.” in Fried HO and SS Schmidt (eds.) the Measurement of Productive Efficiency: Techniques and Applications Oxford U.K.: 352-373.