Vargas-Zapata, C. , Conde-Sarmiento, M. , Maestre-Vargas, M.. "Calcium Biochemical Indicators in a Group of Schoolchildren with Low Socioeconomic Status from Barranquilla, Colombia". World Academy of Science, Engineering and Technology, Open Science Index 167, International Journal of Nutrition and Food Engineering, (2020), 14(11), 376 - 379.