https://books.google.com.ar/books?id=-CfADgAAQBAJ&lpg=PP1&ots=W__TI8hYMb&dq=%22black%20lives%20matter%22%20as%20social%20movement&lr&hl=es&pg=PR3#v=onepage&q=%22black%20lives%20matter%22%20as%20social%20movement&f=false