TY - GEN TY - GEN T1 - Down quark mixing in superstring models T2 - Preprint series in theoretical physics / University of Helsinki A1 - Enqvist, Kari, 1954- A2 - Maalampi, Jukka, 1950- A2 - Roos, M., 1931- LA - eng PP - Hki PB - University of Helsinki. Research Institute for Theoretical Physics YR - 1986 UL - https://kansalliskirjasto.finna.fi/Record/fikka.3272731 ER -