The authors regret a missing entry [8] in the bibliography. Instead of “!!! INVALID CITATION !!! [8]”, the entry should read:
[8] Köhler J, Geels FW, Kern F, Markard J, Onsongo E, Wieczorek A, Alkemade F, Avelino F, Bergek A, Boons F, Fünfschilling L, Hess D, Holtz G, Hyysalo S, Jenkins K, Kivimaa P, Martiskainen M, McMeekin A, Mühlemeier MS, Nykvist B, Pel B, Raven R, Rohracher H, Sandén B, Schot J, Sovacool B, Turnheim B, Welch D, Wells P. 2019, An agenda for sustainability transitions research: State of the art and future directions. Environmental Innovation and Societal Transitions (31) 1–32, https://doi.org/10.1016/j.eist.2019.01.004.
The author would like to apologise for any inconvenience caused.