authorship.setOrder(new Integer(authors.indexOf(person)));
authorship.setAuthorOrder(new Integer(authors.indexOf(person)));
    public void setAuthorships(List<Person> authors) {    	removeAuthorships();	    for (Person person : authors) {	        final Authorship authorship = new Authorship();            	        authorship.setAuthor(person);	        authorship.setResult(this);	        authorship.setOrder(new Integer(authors.indexOf(person)));	    }	}