A note on finite groups with few values in a column of the character table
Rendiconti del Seminario Matematico della Università di Padova, Tome 115 (2006), pp. 161-164 
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     author = {Bianchi, Mariagrazia and Chillag, David and Pacifici, Emanuele},
     title = {A note on finite groups with few values in a column of the character table},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {161--164},
     year = {2006},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {115},
     mrnumber = {2245593},
     zbl = {1156.20007},
     language = {en},
     url = {https://www.numdam.org/item/RSMUP_2006__115__161_0/}
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Bianchi, Mariagrazia; Chillag, David; Pacifici, Emanuele. A note on finite groups with few values in a column of the character table. Rendiconti del Seminario Matematico della Università di Padova, Tome 115 (2006), pp. 161-164. https://www.numdam.org/item/RSMUP_2006__115__161_0/

[1] M. Bianchi - A. Gillio - M. Herzog - G. Qian - W. Shi, Characterization of non-nilpotent groups with two irreducible character degrees, J. Algebra 284 (2005), pp. 326-332. | Zbl | MR

[2] B. Huppert, Character Theory of Finite Groups, De Gruyter, Berlin, 1988. | Zbl | MR

[3] I.M. Isaacs, Character Theory of Finite Groups, Academic Press, New York, 1976. | Zbl | MR