On the Comparison of Stability of YBa\(_2\)Cu\(_{3-x}\)Zn\(_x\)O\(_{7-δ}\), YBa\(_{2-x}\)Sr\(_x\)Cu\(_3\)O\(_{7-δ}\) and YBa\(_2\)Cu\(_{3-x}\)Al\(_x\)O\(_{7-δ}\) in Water for Various Concentration of Zn \((0 - Sharma, Seema Vats (2016)