On the number of roots in an algebraic equation for a circle.

[21] 1908, B SOC MATH FRANCE, V36, P141

[22] 1896, P LOND MATH SOC, V27, P60

[23] 1917, ARCH MATH, V25, P196

[24] 1921, P PHYS MATH SOC JAPA, V3, P175

[25] J MATH, V144, P75

[26] 1917, J MATH, V147, P205

[27] 1917, J MATH, V147, P217

[21] 1908, B SOC MATH FRANCE, V36, P141

[22] 1896, P LOND MATH SOC, V27, P60

[23] 1917, ARCH MATH, V25, P196

[24] 1921, P PHYS MATH SOC JAPA, V3, P175

[25] J MATH, V144, P75

[26] 1917, J MATH, V147, P205

[27] 1917, J MATH, V147, P217