@article{CTT100432157,
  author = {Tetsuji Yano and Hisahiko Matsukasa and S. Shibata and masayuki yamane},
  title = {Method of Melting Pb-Sn-P-O-F Glasses with High Controllability of F/O Ratio},
  journal = {Trans. Mat. Res. Soc. Jpn.},
  year = 1993,
}