@article{article103a4165,
title   = {Continuous and pulse feedings of urea as a nitrogen source in fed-batch cultivation of Spirulina platensis},
author = {Sanchez-Luna, Luis Dante and Converti, Attilio and Tonini, Gabriela Cristina and Sato, Sunao and Carvalho, João Carlos Monteiro de},
year = {2004},
doi = {10.1016/j.aquaeng.2004.04.003},
journal   = {Aquacultural Engineering}
}