N.P. Taylor, Daniela C. Zappi.
1989
.
An alternative view of generic delimitation and relationship in tribe Cereeae (Cactaceae)
. Bradleya 7: 13—40.
Charlotte Morley Taylor, Daniela C. Zappi.
2006
.
Flora of Ecuador: Rubiaceae (part 5) Psychotrieae
. Volumen 79 de Flora of Ecuador. Editor Department of plant and environmental sci. Göteborg University, 113 pp.
ISBN 918552901X
.
Nigel P. Taylor, Daniela C. Zappi.
2004
.
Cacti of Eastern Brazil
. Edición ilustrada de Royal Botanic Gardens, Kew, 499 pp.
ISBN 1842460560
.
Daniela C. Zappi, T.S. Nunes.
2002
.
Lista preliminar da familia Rubiaceae na região nordeste do Brasil
. Volumen 1 de Repatriation of Kew Herbarium data for the Flora of Northeastern Brazil series. Editor Royal Botanic Gardens, 50 pp.
ISBN 1842460447
.
Daniela C. Zappi, T.S. Nunes.
1994
.
Pilosocereus (Cactaceae): the genus in Brazil
. Volumen 3 de Succulent plant research. Edición ilustrada de D. Hunt, 160 pp.
ISBN 0951723448
.
Daniela C. Zappi, T.S. Nunes.
1992
.
Revisão taxonômica de Pilosocereus Byles & Rowley (Cactaceae) no Brasil
. 542 pp.