Ultratrace minerals. Authors: Nielsen, Forrest H. USDA, ARS Source: Modern nutrition in health and disease / editors, Maurice E. Shils ... et al. Baltimore: Williams & Wilkins, c1999., p. 283-303. Issue Date: 1999 URI:
Education (2010). «CHNOPS: The Six Most Abundant Elements of Life». Pearson Education. Pearson BioCoach. Archivado desde el original el 27 de julio de 2017. Consultado el 10 de diciembre de 2010. «Most biological molecules are made from covalent combinations of six important elements, whose chemical symbols are CHNOPS. ... Although more than 25 types of elements can be found in biomolecules, six elements are most common. These are called the CHNOPS elements; the letters stand for the chemical abbreviations of carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur.»
Education (2010). «CHNOPS: The Six Most Abundant Elements of Life». Pearson Education. Pearson BioCoach. Archivado desde el original el 27 de julio de 2017. Consultado el 10 de diciembre de 2010. «Most biological molecules are made from covalent combinations of six important elements, whose chemical symbols are CHNOPS. ... Although more than 25 types of elements can be found in biomolecules, six elements are most common. These are called the CHNOPS elements; the letters stand for the chemical abbreviations of carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur.»
«Atoms & Life». 27 de septiembre de 2009. Archivado desde el original el 22 de enero de 2021. Consultado el 9 de enero de 2021.
