\cite{sep-formal-belief}\cite{Spohn2009}\cite{Skovgaard_Olsen_2015}\cite{Spohn_2013}\cite{Skovgaard_Olsen_2015}\cite{Spohn_2014}\cite{Huber_2014}\cite{Skovgaard_Olsen_2016}\cite{Vidal_2017}\cite{Skovgaard_Olsen_2016a}\cite{COGS:COGS12462}\cite{Skovgaard_Olsen_2016b}\cite{BARATGIN_2014}\cite{Douven_2013}\cite{sep-formal-belief}\cite{sep-propositions}\cite{sep-possible-worlds}\cite{sep-belief}\cite{sep-logic-modal}