@article{article, title  = {{Muon pair production by muons and narrow muon bundles underground}},

 url = {{}},

 year = {{1998}},

 month = {{1}},

 author = {{Kudryavtsev VA and Ryazhskaya OG}},

 volume = {{21}},

 journal = {{Nuovo Cimento della Societa Italiana di Fisica C}},

 issue = {{2}},

 pages = {{171-176}},

 note = {{Accessed on 2024/09/20}}}