Observation of focusing of 400 GeV/c proton beam with the help of bent crystals - Scandale,W; Arduini,G; Butcher,M; Cerutti,F; Gilardoni,S; Lechner,A; Losito,R; Masi,A; Metral,E; Mirarchi,D; Montesano,S; Redaelli,S; et al. (PHYSICS LETTERS B, 2014)