1. Superconductivity at 39 K in magnesium diboride
2. W.N. Kang, C.U. Jung, Kijoon H.P. Kim, Min-Seok Park, S.Y. Lee, Hyeong-Jin Kim, Eun-Mi Choi, Kyung Hee Kim, Mun-Seog Kim, Sung-Ik Lee, Cond-mat/0102313, 2001.
3. B. Lorenz, R.L. Meng, C.W. Chu, Cond-mat/0102264, 2001.
4. Q. Feng, Z. Luo, Z. Gao, X. Zhang, G. Wen, R. Zheng, in preparation.
5. D.K. Finnemore, J.E. Ostenson, S.L. Bud'ko, G. Lapertot, P.C. Canfield, Cond-mat/0102114, 2001.