La Monte Young has pioneered the concept of extended time durations in contemporary music for over 40 years. He contributed extensively to the study of just intonation and to the development of rational number based tuning systems that are used in his periodic composite sound waveform environments, as well as in many of his major performance works. Presentations of Young's work in the U.S. and Europe, as well as his theoretical writings, gradually influenced a group of composers to create a static, periodic music which became known as Minimalism. Musician magazine stated, "As the acknowledged father of minimalism and guru emeritus to the British art-rock school, his influence is pervasive," and in 1985 the Los Angeles Herald Examiner wrote, " for the past quarter of a century he has been the most influential composer in America. Maybe in the world." In Minimalism:Origins, 1993, Edward Strickland added, “Young is now widely recognized as the originator of the most influential classical music style of the final third of the twentieth century.”