Gledhill, Christopher. „On the Alternation Between Complex Prepositions and Adverbial Prepositions in Esperanto, Such As En La Mezo De Vs. Meze De En La Kadro De Vs. Kadre De”. Investigationes Linguisticae, t. 47, grudzień 2023, s. 20-50, doi:10.14746/il.2023.47.2.