Pellegrino, G. and Savona, M. (2017) No Money, No Honey? Financial versus Knowledge and Demand Constraints on Innovation. Research Policy, 46, 510-521.
 D’este, P., Iammarino, S., Savona, M., et al. (2012) What Hampers Innovation? Revealed Barriers versus Deterring Barriers. Research Policy, 41, 482-488.
 Blind, K., Petersen, S.S. and Riillo, C.A.F. (2017) The Impact of Standards and Regulation on Innovation in Uncertain Markets. Research Policy, 46, 249-264.
 Holzl, W. and Janger, J. (2014) Distance to the Frontier and the Perception of Innovation Barriers across European Countries. Research Policy, 43, 707-725.
 D’este, P., Rentocchini, F. and Vega-Jurado, J. (2014) The Role of Human Capital in Lowering the Barriers to Engaging in Innovation: Evidence from the Spanish Innovation Survey. Industry and Innovation, 21, 1-19. https://doi.org/10.1080/13662716.2014.879252
 Huang, X.L. and Chi, R.Y. (2013) Innovation in China’s High-Tech Industries: Barriers and Their Impact on Innovation Performance. International Journal of Technology Management, 62, 35-55. https://doi.org/10.1504/ijtm.2013.053044
 Savignac, F. (2008) Impact of Financial Constraints on Innovation: What Can Be Learned from a Direct Measure? Economics of Innovation & New Technology, 17, 553-569.
 Iammarino, S., Sanna-Randaccio, F. and Savona, M. (2009) The Perception of Obstacles to Innovation. Multinational and Domestic Firms in Italy. Revue D économie Industrielle, 125, 75-104. https://doi.org/10.4000/rei.3953
 Segarra-Blasco, A., Garcia-Quevedo, J. and Teruel-Carrizosa, M. (2008) Barriers to Innovation and Public Policy in Catalonia. International Entrepreneurship & Management Journal, 4, 431-451. https://doi.org/10.1007/s11365-008-0086-z
 Najda-Janoszka, M. and Kopera, S. (2014) Exploring Barriers to Innovation in Tourism Industry—The Case of Southern Region of Poland. Procedia-Social and Behavioral Sciences, 110, 190-201. https://doi.org/10.1016/j.sbspro.2013.12.862
 Resende, M., Strube, E. and Zeidan, R. (2014) Complementarity of Innovation Policies in Brazilian Industry: An Econometric Study. International Journal of Production Economics, 158, 9-17. https://doi.org/10.1016/j.ijpe.2014.07.009
 Pellegrino, G. and Savona, M. (2013) Is Money All? Financing versus Knowledge and Demand Constraints to Innovation. IEB Working Paper N, 9 July 2013.
 Holzl, W. and Janger, J. (2013) Does the Analysis of Innovation Barriers Perceived by High Growth Firms Provide Information on Innovation Policy Priorities? Technological Forecasting and Social Change, 80, 1450-1468.
 Souto, J.E. and Rodriguez, A. (2015) The Problems of Environmentally Involved Firms: Innovation Obstacles and Essential Issues in the Achievement of Environmental Innovation. Journal of Cleaner Production, 101, 49-58. https://doi.org/10.1016/j.jclepro.2015.04.017
 Antonioli, D., Marzucchi, A. and Savona, M. (2017) Pain Shared, Pain Halved? Cooperation as a Coping Strategy for Innovation Barriers. Journal of Technology Transfer, 42, 841-864.
 Kanama, D. and Nishikawa, K. (2017) What Type of Obstacles in Innovation Activities Make Firms Access University Knowledge? An Empirical Study of the Use of University Knowledge on Innovation Outcomes. Journal of Technology Transfer, 42, 141-157.
 Adeyeye, D., Egbetokun, A., Opele, J., Oluwatope, O. and Sanni, M. (2018) How Barriers Influence Firms’ Search Strategies and Innovative Performance. International Journal of Innovation Management, 22, 21. https://doi.org/10.1142/s1363919618500111