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Ramappa, P. G. (1984) Analysis of psychoactive phenothiazine drugs. Indian Journal of Hospital Pharmacy, 21 (5). pp. 208-214. ISSN 0019526X
Nayak, A. and Ramappa, P. G. and Yathirajan, H. S. and Subrahmanya (1982) Chloramine-T as a titrant for the determination of some selected antibiotics. Acta pharmaceutica Hungarica, 52 (3). p. 102. ISSN 0001-6659
Nayak, A. N. and Ramappa, P. G. and Yathirajan, H. S. (1982) Determination of Phenothiazine-derivatives of Pharmaceutical importance by extraction Spectrophotometric method. Anales De Quimica Serie C-Quimica Organica Y Bioquimica, 72 (1). pp. 86-88.
Nayak, A. N. and Ramappa, P. G. and Yathirajan, H. S. and Manjappa, S. (1982) Microdetermination of niobium (V) with imipramine hydrochloride. Acta chimica Hungarica, 111 (2). pp. 233-238.
Nayak, Anant N. and Ramappa, P. G. and Yathirajan, H. S. and Manjappa, S. (1982) Spectrophotometric determination of microgram amounts of penicillins by solvent extraction with azure b. Analytica Chimica Acta, 134. 411 - 415. ISSN 0003-2670
Nayak, Anant N. and Manjappa, S. and Ramappa, P. G. and Yathirajan, H. S. (1981) Improvement of the extractionspectrophotometric thiocyanate method for the determination of rhenium by addition of imipramine. Fresenius' Zeitschrift für analytische Chemie, 309 (5). p. 396. ISSN 1432-1130
Nayak, A. N. and Ramappa, P. G. and Yathirajan, H. S. and Subrahmanya, U. (1981) Extractive Spectrophotometric Determination of N-Substituted Phenothiazines In Pharmaceutical Preparations With Alizarin Red-S. Annali Di Chimica, 71 (11). pp. 721-727.
