@article{ASNSP_1987_4_14_4_513_0, author = {Lehmann, R. and Feldmueller, D.}, title = {Homogeneous $CR$-hypersurface-structures on spheres}, journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze}, pages = {513--525}, publisher = {Scuola normale superiore}, volume = {Ser. 4, 14}, number = {4}, year = {1987}, mrnumber = {963488}, zbl = {0658.32014}, language = {en}, url = {http://www.numdam.org./item/ASNSP_1987_4_14_4_513_0/} }