Lexical Methods of Sentence Alignment I: Kay & Roscheisen, 1993
Assume the first and last sentences of the texts align. These are the initial anchors.
Then, until most sentences are aligned:
1. Form an envelope of possible alignments.
2. Choose pairs of words that tend to co-occur in these potential partial alignments.
3. Find pairs of source and target sentences which contain many possible lexical correspondences. The most reliable of these pairs are used to induce a set of partial alignments which will be part of the final result.