... In recent years, catalogs and professional writings on various issues of Rijeka appeared signed by famous researchers like Guglielmo Oliva, Alberto Diena, Renato Mondolfo and others, but no doubt the new catalog by Ivan Martinaš adds to previous studies such a dimension of new information that, in my opinion, every collector, from less to more experienced ones, should put the catalog among the essential works in their philatelic library. The readers will pleasantly discover in the catalog the above mentioned stamps and postal usages they probably never supposed existed.

... In the last eighty or so years, many texts on the stamps of Rijeka have been written, and there were many discussions on the subject. But, for the first time we have a work – a reference book sistematically elaborating philatelic material from 1918 to 1924, encouraging the reader to further reflect and do researches on the field, what in fact is its greatest value.