Zhou, S., Yu, D., Yang, Z. and Liu, X. (2007). “Study of method on parking guidance
                           route optimization based on parking lot choice.” International Conference on Transportation
                           Enginee, Vol. 1, No. 4.Zhou, S., Yu, D., Yang, Z. and Liu, X. (2007). “Study of method
                           on parking guidance route optimization based on parking lot choice.” International
                           Conference on Transportation Enginee, Vol. 1, No. 4.
