"Patent." . . "Kooperation." . . "Technologie." . . "Ökonometrie." . . "Innovation." . . . . . . "Online-Publikation" . "Studies on informal research collaborations and knowledge transfer empirical evidence from the micro-level = Studien zu informellen Forschungskooperationen und Wissenstransfer" . . "Studien zu informellen Forschungskooperationen und Wissenstransfer : empirische Evidenz von der Mikroebene" . . . "Studien zu informellen Forschungskooperationen und Wissenstransfer" . . . . . . . "Studies on informal research collaborations and knowledge transfer : empirical evidence from the micro-level" . . "Studies on informal research collaborations and knowledge transfer empirical evidence from the micro-level" . . .