Scheuermann, E., Cea, M., Schoch, S., Ojeda, M., & Ihl, M. (2002). Stability study of edible sunflower oil colored with chlorophyll pigments and with addition of oregano oleoresin (Origanum vulgare L.) during the storage in darkness. Grasas Y Aceites, 53(3), 289–297. https://doi.org/10.3989/gya.2002.v53.i3.319