1. L. Carroll, Through the Looking Glass, Ch. 4, Verse 9 of the poem The Walrus and the Carpenter.
2. Dynamics of Gas-Surface Interaction,1982
3. Structural Studies of Surfaces with Atomic and Molecular Beam Diffraction;Engel;Springer Tracts in Mod. Phys.,1981
4. G. Boato and P. Cantini, Diffraction of Neutral Atoms and Molecules from Crystalline Surfaces, to be published in Adv. in Electronics and Electron Physics.
5. Proc. 11th Rarefied Gas Dynamics Symposium;Armand,1979