A few references:
Baldauf Jr, R.B. and Kaplan, R.B. (2003) Language policy decisions and power: Who arethe actors? In P.M. Ryan and R. Terborg (eds) Language: Issues of Inequality (pp. 19–37).
Bastardas-Boada, A. (2007). Linguistic sustainability for a multilingual humanity. Glossa. An Interdisciplinary Journal, 2(2).
Skutnabb-Kangas, T. (2012). The stakes: Linguistic diversity, linguistic human rights and mother-tongue-based multilingual education- or linguistic genocide, crimes against humanity and an even faster destruction of biodiversity and our planet. In Forum International de Bamako sur de multilinguisme. “Un premiere etape vers un Sommet Mondial sur le Multilinguisme” Bamako, Mali, 19-21 janvier 2009. Actes du Forum. Bamako: African Union, ACALAN, Maaya, 65-78.