@techreport{269a766e721c41f48aebb84ec79188ad,
title = "Coordinated multifrequency observations of OJ 287 and MK 421 (March 1993)",
keywords = "galaxies: active, quasars, galaxies: active, quasars, galaxies: active, quasars",
author = "A. Sillanp{\"a}{\"a} and L.O. Takalo and E. Valtaoja and H. Ter{\"a}sranta and Yu.S. Efimov and N. Shakhovkoy and J. Heidt and H. Bock",
year = "1994",
language = "English",
series = "IAU Symposium 159, Active Galactic Nuclei Across the Electromagnetic Spectrum, 30.8.-4.9.1993",
publisher = "Kluwer Academic Publishers",
type = "WorkingPaper",
institution = "Kluwer Academic Publishers",
}