@article{article, title  = {{Ballistic focusing of polyenergetic protons driven by petawatt laser pulses}},

 publisher = {{American Physical Society}},

 url = {{}},

 year = {{2011}},

 month = {{1}},

 author = {{Kar S and Markey K and Borghesi M and Carroll DC and McKenna P and Neely D and Quinn MN and Zepf M}},

 volume = {{106}},

 journal = {{Physical review letters}},

 pages = {{225003-225003}},

 note = {{Accessed on 2024/10/23}}}