[1]
Ramírez Ibagon, R. and Galvis Vargas, R.I. 2005. New challenge: the development of social competition for peaceful coexistence. Praxis Pedagógica. 5, 6 (Feb. 2005), 42–47. DOI:https://doi.org/10.26620/uniminuto.praxis.5.6.2005.42-47.