Ahmed Koubaa, Samia Belkhir, Ayda Khadhri, Mustapha Ksontini, Hamid Nadji, Samira Smiti, Tatjana Stevanovic. Seasonal effect on the chemical composition of the leaves of Stipa tenacissima L. and implications for pulp properties. 2013. Industrial Crops and Products 44:56-61 DOI : 10.1016/j.indcrop.2012.09.023