1. Caballero i Lluch, J.V., 1992. L'arròs en el Delta de l'Ebre: resultats dels assaigs 1979–1990. Departament d'Agricultura Ramaderia i Pesca, Generalitat de Catalunya. Fundació ‘la Caixa’, Barcelona.
2. Casanova, D., 1998. Quantifying the effects of land conditions on rice growth: a case study in the Ebro Delta (Spain) using remote sensing. Doctoral thesis, Wageningen Agricultural University, Wageningen.
3. Nutrient response of seedlings of wild and cultivated Oryza species;Cook;Field Crops Res.,1983
4. Decagon Devices Inc., 1989. Sunfleck Ceptometer User's Manual. Decagon Devices Inc., Pullman.
5. Concepts for a new plant type for direct seeded flooded tropical rice;Dingkuhn,1991