  Extending the method proposed in [arXiv:1109.5524], we derive QQ-relations
(functional relations among Baxter Q-functions) and T-functions (eigenvalues of
transfer matrices) for fusion vertex models associated with the twisted quantum
affine superalgebras $U_{q}(gl(2r+1|2s)^{(2)})$, $U_{q}(gl(2r|2s+1)^{(2)})$,
$U_{q}(gl(2r|2s)^{(2)})$, $U_{q}(osp(2r|2s)^{(2)})$ and the untwisted quantum
affine orthosymplectic superalgebras $U_{q}(osp(2r+1|2s)^{(1)})$ and
$U_{q}(osp(2r|2s)^{(1)})$ (and their Yangian counterparts, $Y(osp(2r+1|2s))$
and $Y(osp(2r|2s))$) as reductions (a kind of folding) of those associated with
$U_{q}(gl(M|N)^{(1)})$. In particular, we reproduce previously proposed
generating functions (difference operators) of the T-functions for the
symmetric or anti-symmetric representations, and tableau sum expressions for
more general representations for orthosymplectic superalgebras
[arXiv:0911.5393,arXiv:0911.5390], and obtain Wronskian-type expressions
(analogues of Weyl-type character formulas) for them. T-functions for spinorial
representations are related to reductions of those for asymptotic limits of
typical representations of $U_{q}(gl(M|N)^{(1)})$.
