R. Baer, Classes of finite groups and their properties, Illinois J. Math., 1 (1957) 115–187.
 A. Ballester-Bolinches, R. Esteban-Romero, P. Jim´enez-Seral and H. Meng, Bounds on the number of maximal
subgroups with applications to random generation of finite groups, Preprint.
 A. Ballester-Bolinches and L. M. Ezquerro, Classes of finite groups, Mathematics and Its Applications, Springer,
Dordrecht, 584 (2006).
 A. V. Borovik, L. Pyber and A. Shalev, Maximal subgroups in finite and profinite groups, Trans. Amer. Math.
Soc., 348 (1996) 3745–3761.
 T. C. Burness, M. W. Liebeck and A. Shalev, Generation and random generation: From simple groups to maximal
subgroups, Adv. Math., 248 (2013) 59–95.
 F. Dalla Volta and A. Lucchini, Finite groups that need more generators than any proper quotient, J. Austral.
Math. Soc. Ser. A, 64 (1998) 82–91.
 F. Dalla Volta, A. Lucchini and F. Morini, On the probability of generating a minimal d-generated group, J. Aust.
Math. Soc., 71 (2001) 177–185.
 E. Detomi and A. Lucchini, Crowns and factorization of the probabilistic zeta function of a finite group, J. Algebra,
265 (2003) 651–668.
 E. Detomi and A. Lucchini, Crowns in profinite groups and applications, Noncommutative Algebra and Geometry,
Lect. Notes Pure Appl. Math., Chapman & Hall/CRC, 243 (2006) 47–62.
 J. D. Dixon, The probability of generating the symmetric group, Math. Z., 110 (1969) 199–205.
 W. Gasch¨utz, Die Eulersche Funktion endlicher aufl¨osbarer Gruppen, Illinois J. Math., 3 (1959) 469–476.
 A. Jaikin-Zapirain and L. Pyber, Random generation of finite and profinite groups and group enumeration, Ann.
Math., 173 (2011) 769–814.
 , Random generation of finite and profinite groups and group enumeration, http://verso.mat.uam.es/
~andrei.jaikin/preprints/pfg.pdf, 2017, Visited 20th February, 2017.
 W. M. Kantor and A. Lubotzky, The probability of generating a finite classical group, Geom. Dedicata, 36 (1990)
 M. W. Liebeck and A. Shalev, The probability of generating a finite simple group, Geom. Dedicata, 56 (1995)
 A. Lubotzky, The expected number of random elements to generate a finite group, J. Algebra, 257 (2002) 452–459.
 A. Mann and A. Shalev, Simple groups, maximal subgroups, and probabilistic aspects of profinite groups, Israel
J. Math., 96 (1996) 449–468.
 E. Netto, The theory of substitutions and its applications to algebra, Second edition. Revised by the author and
translated with his permission by F. N. Cole Chelsea Publishing Co., New York, 1964.
 I. Pak, On probability of generating a finite group, Preprint, http://citeseerx.ist.psu.edu/viewdoc/summary?
 C. Pomerance, The expected number of random elements to generate a finite abelian group, Period. Math. Hungar.,
43 (2001) 191–198.
 L. Pyber, The number of maximal core-free subgroups of a finite group, In preparation.
 J. Wiegold, Growth sequences of finite groups IV, J. Austral. Math. Soc. (Ser. A), 29 (1980) 14–16.