Byrne, P. J., P. Ryan, and C. Heavey. ‚ÄúSustainable Logistics: A Literature Review and Exploratory Study of Irish Based Manufacturing Organizations‚ÄĚ. International Journal of Engineering and Technology Innovation, Vol. 3, no. 3, July 2013, pp. 200-13, http://ojs.imeti.org/index.php/IJETI/article/view/110.