Interferometric view of the circumstellar envelopes of northern FU Orionis-type stars O. Fehér, Á. Kóspál, P. Ábrahám, M. R. Hogerheijde and C. Brinch A&A, 607 (2017) A39 Published online: 06 November 2017 DOI: 10.1051/0004-6361/201731446