L. Velden

The centre-to-limb variation of the moon's brightness at 2 and 6cm wavelength

E. Fürst, W. Hirth, M. Butz, 1977 .

The Draco nebula : a molecular cloud in the galactic halo ?

J. Cernicharo, U. Mebold, W. Goerigk, 1985 .