Sparse Coding in Authorship Attribution for Polish Tweets Piotr Grzybowski author Ewa Juralewicz author Maciej Piasecki author 2019-09 text Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2019) Ruslan Mitkov editor Galia Angelova editor INCOMA Ltd. Varna, Bulgaria conference publication grzybowski-etal-2019-sparse 10.26615/978-954-452-056-4_048 https://aclanthology.org/R19-1048/ 2019-09 409 417