Many of their songs are musical settings of Esperanto poetry, including works by Poul Thorsen, William Auld and Julio Baghy.
Floroj sen kompar
William Shakespeare | William Laud | William Blake | William | William III of England | William Morris | William McKinley | William Howard Taft | William Ewart Gladstone | William the Conqueror | William S. Burroughs | William Shatner | William Faulkner | William Randolph Hearst | William Wordsworth | William Tecumseh Sherman | William Hogarth | Prince William, Duke of Cambridge | William Penn | William Jennings Bryan | William Gibson | William Wilberforce | William James | William Makepeace Thackeray | Fort William | William Hanna | William Hague | William III | William Hurt | William Walton |
Writers and researchers who have collaborated with the Center include: William Auld, Detlev Blanke, Marjorie Boulton, W. Collinson, Probal Dasgupta, Isaj Dratwer, Mark Fettes, Rudolf Haferkorn, Ulrich Lins, François Lo Jacomo, G. F. Makkink, Paul Neergaard, Robert Phillipson, Claude Piron, Juan Regulo Perez, R. Rokicki, Victor Sadler, Klaus Schubert, Tove Skutnabb-Kangas, Gaston Waringhien, and R. Wood.
Writers from many countries worldwide are regular contributors, including William Auld, Osmo Buller, Renato Corsetti, Fernando de Diego, István Ertl, Paul Gubbins, Sten Johansson, Wolfgang Kirschstein, Lee Chong-Yeong, Ulrich Lins, Daniel Luez, Valentin Melnikov, Julian Modest, Gonçalo Neves, Sergio Pokrovskij, Anna Ritamäki, Ziko Marcus Sikosek (Ziko van Dijk), Giorgio Silfer and Walter Żelazny.