P. Braun

Three new species of Euphorbia subgenus Chamaesyce (Euphorbiaceae) endemic to Brazil

R. Riina, I. Cordeiro, O. L. M. Da Silva, 2021 .

High proportion of cactus species threatened with extinction

George D. Gann, A. P. Ferreira, A. Búrquez, 2015, Nature Plants.

The Opuntia inamoena complex in Brazil. 2. Opuntia estevesii P. J. Braun - a new species from Bahia.

P. Braun, 1990 .

The pendent cacti of Brazil

A. Hofacker, P. Braun, 2006 .

On the taxonomy of Brazilian Cereeae (Cactaceae)

P. Braun, 1988, Bradleya.