j-Planes. - Norman L. Johnson; Rolando Pomareda; F. W. Wilke (J. Comb. Theory A, 1991)

Transitive Partial Parallelisms of Deficiency One. - Norman L. Johnson; Rolando Pomareda (Eur. J. Comb., 2002)

Partial Parallelisms With Sharply Two-Transitive Skew Spreads. - Norman L. Johnson; Rolando Pomareda (Ars Comb., 2004)

Collineation groups of translation planes admitting hyperbolic Buekenhout or parabolic Buekenhout-Metz unitals. - Norman L. Johnson; Rolando Pomareda (J. Comb. Theory A, 2007)