Antemireanu contributed political articles, literary feuilletons, translations, verses, sketches, short stories, literary and dramatic news and reviews to "Convorbiri Literare", "Litere – științe – arte", "Noua revistă română", "Povestea vorbei", "Revista literară", "Revista poporului", "Revista ilustrată" and "Secolul". He signed using various pen names: Lys, Hyalmar, Elvira Santorino, Alan Damian, Demeter, Emir, Lysandros, Pollux, Seraficus, Ulys, Vindex, Zara, Zaratustra. Beset by material difficulties and burdened by the duties of newspaper work, Antemireanu lived in the bohemian milieu of Bucharest coffeehouses; he died young, of tuberculosis. He translated from Henrik Ibsen, wrote poetry and a novel, "Din vremea lui Căpitan Costache", which appeared in 1937. Initially serialized in 1898, it deals with the Wallachian Revolution of 1848. Moderate in its politics, the book shows sympathy for Prince Gheorghe Bibescu and contrasts Ion Heliade Rădulescu with the more liberal revolutionaries. In his literary criticism, which included the 1905 volume "Încercări critice. Junimea și roadele ei", Antemireanu attempted to break new ground.