https://www.researchgate.net/profile/Ferdin-Joe-John-Joseph/publication/359859195_Convolutional_Neural_Network_Based_Nutrient_Deficiency_Classification_in_Leaves_of_Elaeis_guineensis_Jacq/links/6252e410ef0134206667df6c/Convolutional-Neural-Network-Based-Nutrient-Deficiency-Classification-in-Leaves-of-Elaeis-guineensis-Jacq.pdf