@inbook{inbook16ae196a,
title   = {Utilization of radioactive phosphorus (32-P) by Azolla-Anabaena and its transfer to rice plants},
author = {Sampaio, María José Amstalden Moraes and Fiore, Marli de Fatima and Ruschel, Alaides Puppin},
year = {1984},
publisher = {Martinus Nijhoff},
journal   = {Practical application of Azolla for rice plant production}
}