@misc{s-a,
  title = {Achievement of 120 W at 80 K by Synchronous Operation of Two Single-Stage G-M Cold Heads Driven by a 2 W Class Compressor},
  author = {S. Masuyama, K. Natsume, K. Kamiya, T. Numazawa},
  publisher = {},
  year = {},
  keywords = {G-M, synchronous operation}
}