1. A Statistical Assessment of Whitened-PCA/SVD under variable Environmental Constraints;L Asiedu;Jornal of Ecological Economics and Statistics,2016
2. Principal Component Analysis;I Jollife;Principal Component Analysis: Second Ed,2002
3. The application of electronic computers to factor analysis;H Kaiser;Journal for Educational Psychology Measures,1960
4. The estimation of correlation matrix from data having missing values;J Kaiser;Makati, Philippines. WHO,1984
5. Vitamin A supplementation during pregnancy;WHO,2016