Çağlayan, Nuri, Esra Uçar, and Can Ertekin. 2020. “The Effect of Various Wavelengths of LED Light on the Physiological and Morphological Parameters of Comfrey (Symphytum Officinale L.)”. Turkish Journal of Agriculture - Food Science and Technology 8 (4):965-70. https://doi.org/10.24925/turjaf.v8i4.965-970.3230.