D’hondt, Eva, Suzan Verberne, Niklas Weber, Kees Koster, and Lou Boves. “Using Skipgrams and PoS-Based Feature Selection for Patent Classification”. Computational Linguistics in the Netherlands Journal 2 (December 1, 2012): 52–70. Accessed May 1, 2024. https://clinjournal.org/clinj/article/view/15.