Shahbazi Nejad, H., Feizian, M., Zahedi, B., & Parvizi, Y. "Assessment effects of drought stress, superabsorbent and manure on agronomic and chemical traits in German chamomile (Matricaria chamomilla L.)", Iranian Journal of Horticultural Science, 49, 4, 2019, 1061-1072. doi: 10.22059/ijhs.2018.228369.1195