  An exact expression of the transmission probability through a finite graphene
superlattice with an arbitrary number of potential barriers $n$ is derived in
two cases of the periodic potential: rectangular electric potential and
$\delta$-function magnetic potential. Obtained transmission probabilities show
two types of resonance energy: barrier-induced resonance energies unchanged as
$n$ varies and well-induced resonance energies undergone the $(n - 1)$-fold
splitting as $n$ increases. Supported by numerical calculations for various
types of graphene superlattices, these analytical findings are assumed to be in
equal applied to all of finite graphene superlattices regardless of potential
natures [electric or magnetic] as well as potential barrier shapes.
