1. R. A. Ajrapetian -G. M. Henkin,Integral representation of differential forms on Cauchy Riemann manifolds and the theory of CR functions I, II, Usp. Mat. Nauk,39 (1984), pp. 39–106; Mat. Sb. Nov. Ser.,127 (1985), pp. 92–112.
2. A. Andreotti -G. A. Fredricks, M. Nacinovich,On the absence of Poincaré lemma in tangential Cauchy Riemann complexes, Ann. Scuola Norm. Sup. Pisa,8 (1981), pp. 365–404.
3. A Andreotti -C. D. Hill,E. E. Levi convexity and the Hans Lewy problem I, II, Ann. Scuola Norm. Sup. Pisa,26 (1972), pp. 352–363, 747–806.
4. A. Andreotti -M. Nacinovich,Noncharacteristic hypersurfaces for complexes of differential operators, Ann. Mat. Pura Appl.,125 (1980), pp. 13–83.
5. T. Audibert,Caractérisation locale par des opérateurs différentiels de restrictions à la sphère de Sn des fonctions pluriharmoniques, C. R. Acad. Sci. Paris,284 (1977), pp. 1029–1031.