Acknowledgements

We are grateful to all the people who sent us their comments and remarks on the JPDOC. We also thank the German Research Foundation for supporting our experimental work by several grants to the Research Group ``Laboratory Astrophysics''. The development of the WWW database was supported by the Volkswagen Foundation and the INTAS grant 99/652. V.I. acknowledges the support by the RFBR grant 00-15-96607.