1. Calcul pseudo-différentiel et produits croisés de C⁎-algébres. I, II;Baaj;C. R. Acad. Sci. Paris, Ser. I,1988
2. The noncommutative geometry of the quantum Hall effect;Bellissard;J. Math. Phys.,1994
3. The leading term of the spectral asymptotics for “non-smooth” elliptic problems;Birman;Funct. Anal. Appl.,1970
4. Spectral asymptotics of nonsmooth elliptic operators. I;Birman;Tr. Mosk. Mat. Obŝ.,1972
5. Asymptotic behavior of the spectrum of pseudodifferential operators with anisotropically homogeneous symbols;Birman;Vestn. Leningr. Univ.,1977