We use phenomenological nonlocal Lagrangians, which lead to non trivial forms
for the quark propagator, to describe the pion. We define a procedure, based on
the Dyson-Schwinger equations, for the calculation of the pion parton
distributions at low Q^2. The obtained parton distributions fulfill all the
wishful properties. Using a convolution approach we incorporate the composite
character of the constituent quarks in the formalism. We evolve, using the
Renormalization Group, the calculated parton distributions to the experimental
scale and compare favorably with the data and draw conclusions.Comment: Latex, 11 pages with 6 figure
