Complex sentence: His theoretical and practical articles have appeared in six of "Down Beat" editions and his scholarly article on the psychology of stage fright, originally published in the Jazz Educators Journal, has subsequently been reprinted in four other publications.
Split into simpler sentences: His theoretical and practical articles have appeared in six of "Down Beat" editions. His scholarly article on the psychology of stage fright, originally published in the "Jazz Educators Journal", has subsequently been reprinted in four other publications.