Tails of Bipartite Distance-regular Graphs. - Michael S. Lang (Eur. J. Comb., 2002)

A new inequality for bipartite distance-regular graphs. - Michael S. Lang (J. Comb. Theory B, 2004)

Almost-bipartite distance-regular graphs with the Q-polynomial property. - Michael S. Lang; Paul M. Terwilliger (Eur. J. Comb., 2007)

Pseudo primitive idempotents and almost 2-homogeneous bipartite distance-regular graphs. - Michael S. Lang (Eur. J. Comb., 2008)

Bipartite distance-regular graphs: The Q-polynomial property and pseudo primitive idempotents. - Michael S. Lang (Discret. Math., 2014)