R. Rashid, “A pioneer in anaclastics: Ibn Sahl on burning mirrors and lenses,” Isis, 81, pp 464-491, 1990.) Rashed, Roshdi “A Pioneer in Anaclastics: Ibn Sahl on Burning Mirrors and Lenses,” Isis, 81: 464–491, 1990; bàn về khả năng Sahl khám phá định luật Snell.
R. Rashid, “A pioneer in anaclastics: Ibn Sahl on burning mirrors and lenses,” Isis, 81, pp 464-491, 1990.) Rashed, Roshdi “A Pioneer in Anaclastics: Ibn Sahl on Burning Mirrors and Lenses,” Isis, 81: 464–491, 1990; bàn về khả năng Sahl khám phá định luật Snell.
↑ R. Rashed, "A Pioneer in Anaclastics: Ibn Sahl on Burning Mirrors and Lenses", Isis 81 (1990): 464–91. Rashed, Roshdi “A Pioneer in Anaclastics: Ibn Sahl on Burning Mirrors and Lenses,” Isis, 81: 464–491, 1990; bàn về khả năng Sahl khám phá định luật Snell.
↑ R. Rashed, "A Pioneer in Anaclastics: Ibn Sahl on Burning Mirrors and Lenses", Isis 81 (1990): 464–91. Rashed, Roshdi “A Pioneer in Anaclastics: Ibn Sahl on Burning Mirrors and Lenses,” Isis, 81: 464–491, 1990; bàn về khả năng Sahl khám phá định luật Snell.