@article{sidiropoulos_99,
author = "G. Kasotakis and E. T. Sarris and P. Marhavilas and Sidiropoulos, Nikolaos and P. Trochoutsos and I. A. Daglis",
journal = "Physics and Chemistry of the Earth",
pages = "79-81",
title = "{V}ariations in the ratio of proton to magnetic field energy density, as observed by {U}lysses/HI-SCALE ",
volume = "24",
year = "1999",
}