Lotfy, H. M., and Y. R. Omran, "Novel absorptivity centering method utilizing normalized and factorized spectra for analysis of mixtures with overlapping spectra in different matrices using built-in spectrophotometer software", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 200, pp. 167-178, 2108.
Lotfy, H. M., and S. S. Saleh, "Testing the purity of spectral profiles: Finger-print resolution of complex matrices and extraction of absorbance signals", Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 205, pp. 160-169, 2108.
Lotfy, H. M., and S. S. Saleh, "ADVANCED AMPLITUDE CENTERING AS AN INVIGORATING MANIPULATION FOR UNIFIED WAVELENGTH SPECTRAL RESOLUTION OF TERNARY MIXTURES", International Journal of Pharmacy and Pharmaceutical Sciences, vol. Vol 9,, , issue Issue 5, pp. 43-50, 2017. advanced_amplitude_modulation_16960-87563-2-pb_1_1.pdf
Lotfy, H. M., Y. M. Fayz, S. El-Hanboushy, and M. Abdelkawy, "Application of Successive and Progressive Spectrophotometric Resolution for the Analysis of Partially or Completely Overlapping Ternary Mixtures ", Analytical Chemistry Letters, vol. 6, issue 6, pp. 718-737 , 2016.
and, H. M. L., S. H. E. R. E. E. N. M. O. S. T. A. F. A. TAWAKKOL, N. E. S. M. A. M. A. H. M. O. U. D. FAHMY, and M. O. S. T. A. F. A. A. B. D. E. L. - A. T. T. Y. SHEHATA, "Comparative Study of the Resolution Efficiency of High-performance Liquid Chromatographic and Chemometrics-assisted UV Spectrophotometric Methods: Application on Pharmaceutical Mixtures ", Analytical Chemistry Letters, vol. 6, issue 3, pp. 205 – 213 , 2016.
Lotfy, H. M., A. M. Michael, C. K. Nessim, and yasmin mohamed fayez, "Comparative study of the resolution efficiency of HPLC and HPTLCdensitometric methods for the analysis of mebeverine hydrochloride and chlordiazepoxide in their binary mixture", European Journal of Chemistry , vol. 7, issue 3, pp. 315‐321 , 2016.
Lotfy, H. M., M. A. B. D. E. L. - M. Hegazy, M. A. M. EL-Aziz, and laila elsayed abdel fattah, "Stability Indicating Spectrophotometric Methods for Determination of Nicardipine in the Presence of its Alkaline Induced Degradation Products ", International Journal of Pharmacy and Pharmaceutical Sciences, vol. 8 , issue 3, pp. 62-66, 2016.
Lotfy, H. M., M. A. Al-Ghobashy, and M. A. Abdallah, "Development and Validation of Stability Indicating Spectrophotometric Methods for Determination of Sulbutiamine in Tablet Dosage Form", Analytical chemistry Letters , vol. 6, issue 2, pp. 159 - 173 , 2016.