ジョン・ヴィッカーズ
↑ Anthony Tommasini (2015年7月12日). “Jon Vickers, Opera Star Known for His Raw Power and Intensity, Dies at 88”. The New York Times. http://www.nytimes.com/2015/07/13/arts/music/jon-vickers-opera-star-known-for-his-raw-power-and-intensity-dies-at-88.html