NRO 45 M and ASTE 10 M observations of dense gas in giant HII regions of M 33 T. Tosaki, R. Miura, T. Sawada, N. Kuno, K. Nakanishi, K. Kohno, S.K. Okumura, S. Komugi, Y. Tamura and R. Kawabe EAS Publications Series, 31 (2008) 211-212 Published online: 04 October 2008 DOI: 10.1051/eas:0831049