There were 1521 hits from 451 distinct visits, 33.4% spiders from baidu, google and MSN. Auto1 121, Auto2 29, CEFE 26, Englynion 13 since 7th Sept. 2013. Sao Paulo State University Brazil F3(Sp); University of Chile UFT166(Sp); Royal Library Copenhagen Denmark general; Massachusetts Institute of Technology (MIT) Educational Note 2; University of Texas UFT152; Jyvaskyla University Finland UFT10. Intense interest all sectors, attached usage file updated since Sept. 7th. 2013.