The claim that standard classical electrodynamics is governed by a Lagrangian formulation yielding both the Lorentz force and Maxwell equations is a foundational textbook fact of physics, requiring no citation.
The retrieved papers are specialized studies on topics like quantum brain dynamics, relativistic fluid dynamics, and fractional electrodynamics, whereas the claim is a foundational and uncontroversial textbook fact in classical physics (the standard electromagnetic Lagrangian density produces Maxwell's equations via the Euler-Lagrange equations and the Lorentz force via the interaction term). Following Step 0, trivially true foundational physics facts are classified as common knowledge.