TY - JOUR AU - Campos, Juan AU - Obaya, Rafael AU - Tarallo, Massimo PY - 2017 SN - 0022-0396 UR - http://uvadoc.uva.es/handle/10324/25742 AB - Fredholm Alternative is a classical tool of periodic linear equations, allowing to describe the existence of periodic solutions of an inhomogeneous equation in terms of the adjoint equation. A few partial extensions have been proposed in the... LA - eng PB - Elsevier TI - Favard theory for the adjoint equation and Fredholm alternative DO - 10.1016/j.jde.2016.09.041 ER -