However, serialism is not by itself a system of composition, nor is it a style.
From the en.wikipedia.org
Rochberg turned to pastiche from serialism after the death of his son in 1963.
From the en.wikipedia.org
Alwyn relished dissonance, and devised his own alternative to twelve-tone serialism.
From the en.wikipedia.org
Serialism first appeared in the 1920s, with antecedents predating that year.
From the en.wikipedia.org
It would soon result in his break toward serialism and eternal notoriety.
From the washingtontimes.com
More and more it became apparent that he could not do it with serialism.
From the time.com
In Chicago he discovered the serialism of Webern and composed a twelve-tone string trio.
From the en.wikipedia.org
His work has an atonal quality that often sounds like Schoenberg's middle-period serialism.
From the time.com
Eventually Goehr's sensibility parted from Boulez's serialism.
From the en.wikipedia.org
More examples
20th century music that uses a definite order of notes as a thematic basis for a musical composition
In music, serialism is a method or technique of composition (Griffiths 2001, 116) that uses a series of values to manipulate different musical elements. ...
Twentieth century compositional method which employs ordered sets of tones instead of the traditional chordal progressions to create the music.
A compositional technique in which one or more aspects of a piece are pre-defined. This music is generally atonal (see above). "Classical serialism" is synonymous with the term "twelve-tone" and refers to the ordering of only the pitch series. ...
The technique of composing with a series, generally a twelve-tone series (but see also rhythmic serialism).
A form of music writing based on Twelve-Tone technique, in which pitch classes, rhythms, and often dynamics are determined systematically.
A method of composition from the early twentieth-century which relies on a set of fixed elements, mainly the order of the notes rather than their relationship to one another, hence this method of composition rejects tonality