@article{Montagna_79_9-1995,
author = "M. Montagna and S. Selleri and M. Zoboli",
title = "Nonlinear Refractive Index in Erbium Doped Optical Amplifies",
volume = "27",
pages = "871--880",
month = "september",
year = "1995",
journal = "Optical and Quantum Electronics",
}