Wohlwill, E. The Discovery of the Parabolic Shape of the Projectile Trajectory: Emil Wohlwill. Galileo in context.(2001).

Wohlwill, Emil. "The Discovery of the Parabolic Shape of the Projectile Trajectory: Emil Wohlwill." Galileo in Context.(2001) .

Wohlwill, Emil. "The Discovery of the Parabolic Shape of the Projectile Trajectory: Emil Wohlwill." Galileo in Context.(2001), .