Gunter Festel et Sven De Cleyn, « Founding angels as an emerging subtype of the angel investment model in high-tech businesses », Venture Capital, vol. 15, no 3, , p. 261–282 (DOI10.1080/13691066.2013.807059, S2CID154613196)
Gunter Festel et Sven De Cleyn, « Founding angels as an emerging subtype of the angel investment model in high-tech businesses », Venture Capital, vol. 15, no 3, , p. 261–282 (DOI10.1080/13691066.2013.807059, S2CID154613196)