Nativization processes in L1 Esperanto - Scientific study about eight native Esperanto speakers from six to fourteen years. By Benjamin K. Bergen. Excerpt from "Journal of Child Language". - http://www2.hawaii.edu/~bergen/papers/NEJCL.pdf
Native Esperanto speakers - Basic information on the phenomenom of Esperanto speaking children. From Wikipedia, the free encyclopedia. - http://en.wikipedia.org/wiki/Native_Esperanto_speakers