[1]
A. P. Ruschel, A. S. Filho, A. B. dos Santos, and F. J. P. Zimmermann, “Pigmentation and mineral composition of different Azolla species”., PAB, vol. 24, no. 4, pp. 431–436, Apr. 2014, doi: 10.1590/S1678-3921.pab1989.v24.15522.