References
- Singleton , R. R. 1940 . “A Method of Minimizing the Sum of Absolute Values of Deviations,” . Annals of Mathematical Statistics , 11 : 301 – 310 .
- Sposito , V. , Smith , W. and McCormick , G. 1978 . Minimizing the Sum of Absolute Deviations , Goettingen : Vandenhoek & Ruprecht .