NIEVES NÚÑEZ SÁNCHEZ2026-01-292026-01-29201510.1016/j.renene.2015.01.0492-s2.0-84956634532https://www.scopus.com/inward/record.uri?eid=2-s2.https://ucocris.uco.es/handle/123456789/26757Renewable Energy, Sustainability and the EnvironmentNew techniques developed to quantify the impurities of olive stone as solid biofuelresearch article