المؤلفون: Pastrano, Andres, Solimano, Andres
URL الوصول: http://elibrary.worldbank.org/doi/pdf/10.1596/0-8213-4670-9http://elibrary.worldbank.org/doi/abs/10.1596/0-8213-4670-9
المؤلفون: Nallari, Raj, Bhattacharya, Rwitwika
المصدر: :67-70
URL الوصول: http://elibrary.worldbank.org/doi/pdf/10.1596/978-0-8213-8785-6http://elibrary.worldbank.org/doi/abs/10.1596/9780821387856_CH08http://elibrary.worldbank.org/doi/pdf/10.1596/9780821387856_CH08http://elibrary.worldbank.org/doi/abs/10.1596/978-0-8213-8785-6