@article{lejpt33277,
 author={Ezema, B. and Ezema, C. and Akpomie, K. and Ugwu, D.},
 year={2018},
 title={Synthetic process of vat-dyes of tetraaza derivatives of three-branched phenothiazine heterocycles},
 journal={Leonardo Electron. J. Pract. Technol.},
 volume={17},
 number={33},
 pages={277-288},
 url={http://lejpt.academicdirect.org/A33/277_288.pdf}
}