Potentiometric Studies on Complexes of Bivalent Metal Ions with N-(2-Hydroxy-3- methoxybenzylidene)-3-aminopyridine and N-(2-Hydroxy-3-methoxybenzylidene )-2-methoxy-5-acetylaminoaniline and Evaluation of these Reagents for Anticoagulant Activity - M. S. MAYADEO (1987)