@article{oai:fun.repo.nii.ac.jp:00003226,
 author = {Ryabov, V. B. and Usik, P. V. and Vavriv, D. M.},
 issue = {6},
 journal = {International Journal of Bifurcations and Chaos},
 month = {},
 pages = {1181--1187},
 title = {Chaotic masking without synchronization},
 volume = {9},
 year = {1999}
}