%0 Journal Article %T Product innovation, process innovation and export propensity: persistence, complementarities and feedback effects in Spanish firms %A Ayllón, Sara %A Radicic, Dragana %J Applied Economics %V 51 %N 33 %P 3650-3664 %@ 1466-4283 %D 2019-07-15 %I Routledge %~ DeepDyve