Willett, P. (2006). The Porter stemming algorithm: Then and now. Program : electronic library and information systems, 40(3), 219-223. https://doi.org/10.1108/00330330610681295
Citácia podle Chicago (17th ed.)Willett, Peter. "The Porter Stemming Algorithm: Then and Now." Program : Electronic Library and Information Systems 40, no. 3 (2006): 219-223. https://doi.org/10.1108/00330330610681295.
Citácia podľa MLA (8th ed.)Willett, Peter. "The Porter Stemming Algorithm: Then and Now." Program : Electronic Library and Information Systems, vol. 40, no. 3, 2006, pp. 219-223, https://doi.org/10.1108/00330330610681295.
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