K. Asada

Greenland telescope project: Direct confirmation of black hole with sub‐millimeter VLBI

P. M. Koch, W. Brisken, R. Blundell, 2014, 1407.2450.

Greenland Telescope (GLT) Project: "A Direct Confirmation of Black Hole with Submillimeter VLBI"

P. Raffin, H. Nishioka, S. Matsushita, 2013, 1310.1665.

First 230 GHz VLBI fringes on 3C 279 using the APEX Telescope

W. Alef, A. P. Marscher, J. Weintroub, 2015, 1506.03244.