@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 2025/01/14}}}