Matematyk i fizyk amerykańska.

The structure of the real number system / by Leon W. Cohen and Gertrude Ehrlich. - Princeton, N. J., 1963. (Associate Professor of Mathematics, Univ. of Maryland)

LCA online

http://hcoonce.math.mankato.msus.edu/html/id.phtml?id=3768

Kp. Surface Diffusion / Grażyna Antczak, Gert Ehrlich. - Cambridge [etc.], 2010.