It was 1994 when I wrote my first paper on a new form of journalism that was emerging at that time. Immediatly, I tried to implement some courses on the topic in the University, and produced some materials on it.
The first handbook on it in Spain was Diaz Noci, Javier. La Escritura digital. Hipertexto y construcción del discurso informativo en el periodismo electrónico. 1 ed. Bilbao: Universidad del País Vasco, Servicio Editorial; 2002. And the second one was published in 2003: Manual de redacción ciberperiodística [Handbook of Online Journalism Newswriting] and gathered many scholars from Spain who worked at the period. Some other materials are accessible on the Internet, for instance a handbook designed for the University of the Basque Country's virtual campus (Periodismo electrónico multimedia, in both Spanish and Basque language versions).
Díaz Noci, Javier. History of Journalism on the Internet: A state of the art and some methodological trends. Revista Internacional de Historia de la Comunicación 2013; 1(1): 253-272.