Comparison of the Effects Stemmer Porter and Nazief-Adriani on the Performance of Winnowing Algorithms for Measuring Plagiarism. - Alam Rahmatulloh; Neng Ika Kurniati; Irfan Darmawan; Adi Zaenal Asyikin; Deden Witarsyah (J. Digit. Inf. Manag., 2020)