The Rijksmuseum | Documentation “Jan Bouterse, 'Early Dutch fipple flutes, with emphasis on the seventeenth century and Jacob van Eyck', The Recorder in the 17th century: Proceedings of the International Recorder Symposium, Utrecht 1993, ed. by David Lasocki, STIMU, Foundation for Historical Performance Practice, Utrecht, 1995, p. 77-90:78-79, 81, plate 2”