  We give an elementary proof of the Bazhanov-Reshetikhin determinant formula
for rational transfer matrices of the twisted quantum super-spin chains
associated with the gl(K|M) algebra. This formula describes the most general
fusion of transfer matrices in symmetric representations into arbitrary finite
dimensional representations of the algebra and is at the heart of analytical
Bethe ansatz approach. Our technique represents a systematic generalization of
the usual Jacobi-Trudi formula for characters to its quantum analogue using
certain group derivatives.
