  We undertake a systematic study of the notion of fibration in the setting of
abstract simplicial complexes, where the concept of `homotopy' has been
replaced by that of `contiguity'. Then a fibration will be a simplicial map
satisfying the `contiguity lifting property'. This definition turns out to be
equivalent to a known notion introduced by G. Minian, established in terms of a
cylinder construction $K \times I_m$. This allows us to prove several
properties of simplicial fibrations which are analogous to the classical ones
in the topological setting, for instance: all the fibers of a fibration have
the same strong homotopy type, a notion that has been recently introduced by
Barmak and Minian; any fibration with a strongly collapsible base is fibrewise
trivial; and some other ones. We introduce the concept of `simplicial
finite-fibration', that is, a map which has the contiguity lifting property
only for finite complexes. Then, we prove that the path fibration $PK \to
K\times K$ is a finite-fibration, where PK is the space of Moore paths
introduced by M. Grandis. This important result allows us to prove that any
simplicial map factors through a finite-fibration, up to a P-homotopy
equivalence. Moreover, we introduce a definition of `\v{S}varc genus' of a
simplicial map and, and using the properties stated before, we are able to
compare the \v{S}varc genus of path fibrations with the notions of simplicial
LS-category and simplicial topological complexity introduced by the authors in
several previous papers. Finally, another key result is a simplicial version of
a Varadarajan result for fibrations, relating the LS-category of the total
space, the base and the generic fiber.
