int y = 0;
sheet.addCell(new Label(0, i, ""));
Label label = (Label) sheet.getCell(0, i);
label.setString(rp.getSourceID());
y++;
sheet.addCell(new Label(1, i, ""));
label = (Label) sheet.getCell(1, i);
label.setString(ResearcherPageUtils.getPersistentIdentifier(rp));
y++;
sheet.addCell(new Label(2, i, ""));
label = (Label) sheet.getCell(2, i);