Journal Article Does external knowledge sourcing matter for innovation? Evidence from the Spanish manufacturing industry Get access Jaider Vega-Jurado, Jaider Vega-Jurado Search for other works by this author on: Oxford Academic Google Scholar Antonio Gutiérrez-Gracia, Antonio Gutiérrez-Gracia Search for other works by this author on: Oxford Academic Google Scholar Ignacio Fernández-de-Lucio Ignacio Fernández-de-Lucio Search for other works by this author on: Oxford Academic Google Scholar Industrial and Corporate Change, Volume 18, Issue 4, August 2009, Pages 637–670, https://doi.org/10.1093/icc/dtp023 Published: 03 June 2009