- ${\left( {x + 1} \right)^2} + {y^2} + {\left( {z + 3} \right)^2} = \sqrt 3 $
- ${\left( {x - 1} \right)^2} + {y^2} + {\left( {z - 3} \right)^2} = \sqrt 3 $
- ${x^2} + {\left( {y - 1} \right)^2} + {\left( {z - 3} \right)^2} = 3$
- ${\left( {x - 1} \right)^2} + {y^2} + {\left( {z - 3} \right)^2} = 3$