This statement is a fundamental definition of kinematics in physics (for example, an object thrown vertically upward momentarily has zero velocity at its peak while continuously experiencing constant downward gravitational acceleration); no citation is needed.
The claim represents a fundamental principle of Newtonian mechanics (e.g., a tossed ball at its apex has zero velocity but non-zero acceleration due to gravity). None of the retrieved papers specifically address or test this foundational physics concept, making it common knowledge by everyday observation and physical definition.