code: @Override
      public BELCitation convert(Citation c) {
          if (c == null) {
              return null;
          }
  
          final List<String> authors = c.getAuthors();
          final String comment = c.getComment();
  
          Date publicationDate = null;
          if (c.getDate() != null) {
              publicationDate = c.getDate().getTime();
          }
  
          String reference = c.getReference();
  
          BELCitation bc = new BELCitation(c.getType().getDisplayValue(),
                  c.getName(), publicationDate, reference, authors, comment);
          return bc;
      }
docs: {@inheritDoc}