@article{JOLT_2000_10_1_a10,
     author = {G. A. Margulis and E. B. Vinberg},
     title = { Some {Linear} {Groups} {Virtually} {Having} a {Free} {Quotient}},
     journal = {Journal of Lie Theory},
     pages = {171--180},
     year = {2000},
     volume = {10},
     number = {1},
     doi = {10.5802/jolt.196},
     zbl = {0958.22008},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.196/}
}