Scott Armbruster

Covariance and decoupling of floral and vegetative traits in nine Neotropical plants: a re-evaluation of Berg's correlation-pleiades concept.

W. Armbruster, V. S. Di Stilio, L., 1999, American journal of botany.

Comparative analysis of late floral development and mating-system evolution in tribe Collinsieae (Scrophulariaceae s.l.).

S. Kalisz, B. G. Baldwin, C. Mulder, 2002, American journal of botany.