PGASetSelectType(3) on Linux
The text b69d5f09ff3a, as Debian 3.1 (Sarge), Debian 3.0 (Woody), Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 2.0 (Hamm), Debian 1.3 (Bo), Debian 1.2 (Rex), Debian 1.1 (Buzz) shipped it.
specify the type of selection to use. Valid choices are PGA_SELECT_PROPORTIONAL, PGA_SELECT_SUS, PGA_SELECT_TOURNAMENT, and PGA_SELECT_PTOURNAMENT for proportional, stochastic universal selection, tournament, and probabilistic tournament selection, respectively. The default is PGA_SELECT_TOURNAMENT.