TY - GEN T1 - Saddle Points and Stark Ladders: Exact Calculations of Exciton Spectra in Superlattices T2 - arXiv PY - 1994/05/23 AU - Whittaker DM ED - DO - DOI: 10.48550/arxiv.cond-mat/9405062 Y2 - 2025/10/31 ER -