 In 1923 he published a book of Dadaist poems, "Helixes", which makes extensive use of calligrams, negative space, free verse, proparoxytones, and the mechanistic frenzy of Futurism.The book's cover was designed by Rafael Barradas, and it was illustrated with woodcuts by Norah Borges.Critics savaged the unorthodox work, which is noteworthy for including some of the first haikus written in Spanish