@article{articlea59f16cc,
title   = {Some instabiblities in the 3 / 1 and 2 / 1 resonances},
author = {Yokoyama, T and Sato, Massae and Tsuchida, Masayoshi},
year = {1988},
doi = {10.1007/bf01238755},
journal   = {Celestial Mechanics & Dynamical Astronomy}
}