@conference{761426, author = {David Christensen and J. Hill and D. Schaafsma and Robert Hickernell and Joseph Pellegrino and W. Tseng}, title = {Vertical-Cavity Semiconductor Structures: Materials Characterization}, year = {1993}, number = {11}, month = {1993-01-01 00:01:00}, publisher = {Tech. Dig., Conf. on Lasers and Electro-Optics (CLEO), Baltimore, MD}, language = {en}, }