@techreport{a3b496f6847e41e0ba3eaaa519ae727d,
title = "Optical observation on 4He-crystals",
keywords = "helium to crystals, optical interferometric, roughening, helium to crystals, optical interferometric, roughening, helium to crystals, optical interferometric, roughening",
author = "A. Babkin and J. Saram{\"a}ki and H. Alles and P. Hakonen and A. Parshin and J. Ruutu",
year = "1994",
language = "English",
series = "Fysiikan P{\"a}iv{\"a}t, J{\"a}rvenp{\"a}{\"a}, 17.-19.3.1994",
publisher = "University of Helsinki, Department of Physics",
pages = "11",
type = "WorkingPaper",
institution = "University of Helsinki, Department of Physics",
}