Stephen Sondheim, Titan of the American Musical, Is Dead at 91 (New York Times)

The mountainous talent of Stephen Sondheim (CNN)

Stephen Sondheim Biography (Britannica)

Stephen Sondheim and the St. Louis Literary Award: Highlights from the ceremony and artist's talk (St. Louis Magazine)

• Some of Sondheim's most famous musicals include, "A Funny Thing Happened on the Way to the Forum," "A Little Night Music" and "Into the Woods."