Songai ou Songhai também temos alguns links

https://pt.wikipedia.org/wiki/Imp%C3%A9rio_Songai

http://www.agencia1.com.br/pmbm/site/page/racismo_africa_songai.asp

http://civilizacoesafricanas.blogspot.com.br/2009/11/o-imperio-de-songai-gao.html

https://www.google.com.br/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=0CFcQFjAL&url=http%3A%2F%2Fwww.cnslb.com.br%2Fdocumentos%2F2014%2FReinos%2520da%2520Africa%2520ocidental%2C%2520Reino%2520Gana%2C%2520Reino%2520de%2520Mali%2520e%2520Reino%2520de%2520Songai.pdf&ei=ptCRVY6oKMuz-QGHsb6gAg&usg=AFQjCNHSAc3yVpx087bJ-8D1hFWgcWe7fg&sig2=oJl31gki46Hdr_Wh_2Y5mg

https://www.youtube.com/watch?v=clOFPwhmODM

http://olhandodobaoba.blogspot.com.br/2012/04/o-imperio-songhai-e-outras-palavras.html