CHOPCHOP: a CRISPR/Cas9 and TALEN web tool for genome editing. - Tessa G. Montague; José M. Cruz; James A. Gagnon; George M. Church; Eivind Valen (Nucleic Acids Res., 2014)

CHOPCHOP v2: a web tool for the next generation of CRISPR genome engineering. - Kornel Labun; Tessa G. Montague; James A. Gagnon; Summer B. Thyme; Eivind Valen (Nucleic Acids Res., 2016)

CHOPCHOP v3: expanding the CRISPR web toolbox beyond genome editing. - Kornel Labun; Tessa G. Montague; Maximilian Krause; Yamila N. Torres cleuren; Håkon Tjeldnes; Eivind Valen (Nucleic Acids Res., 2019)