"Fermionic field" . "fermionic field" . . . "Fermionic field#Dirac fields" . . "fermionic fields" . . "matter fields" . "Dirac fermion" . "Fermionic field" . . . "Dirac fermion fields" . "fields" . "Dirac field" . . "Dirac fields" . "fermion fields" . . "fermionic" .