Fran Novljan was one of the chief promoters of Esperanto in the former Kingdom of Yugoslavia. He was among the founders of the Croatian (Educational Alliance), of which he was the first secretary, and organized Esperanto institutions in Zagreb. Novljan collaborated with Esperanto newspapers and magazines, and was the author of the Esperanto textbook Internacia lingvo esperanto i Esperanto en tridek lecionoj.Istarska enciklopedija Josip Šiklić: Novljan, Fran (pristupljeno 23. ožujka 2020.)Pleadin, Josip. Biografia leksikono de kroatiaj esperantistoj. Đurđevac: Grafokom 2002, p. 108-109,
Fran Novljan was one of the chief promoters of Esperanto in the former Kingdom of Yugoslavia He was among the founders of the Croatian (Educational Alliance), of which he was the first secretary, and organized Esperanto institutions in Zagreb. Novljan collaborated with Esperanto newspapers and magazines, and was the author of the Esperanto textbook Internacia lingvo esperanto i Esperanto en tridek lecionoj.Istarska enciklopedija Josip Šiklić: Novljan, Fran (pristupljeno 23. ožujka 2020)Pleadin, Josip. Biografia leksikono de kroatiaj esperantistoj. Đurđevac: Grafokom 2002, p. 108-109,