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This comment refers to the invited paper available at: doi:10.1007/s11749-010-0197-z.
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Sun, T., Zhang, CH. Comments on: ℓ 1-penalization for mixture regression models. TEST 19, 270–275 (2010). https://doi.org/10.1007/s11749-010-0201-7
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DOI: https://doi.org/10.1007/s11749-010-0201-7