@book { Nontechnologicalandnoneconomicinnovations,
    title = "Non-technological and non-economic innovations",
    subtitle = "Contributions to a theory of robust innovation",
    author = "Steffen {Roth}",
    year = "2009",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1105963"
}