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Asif, Syed SA and Somasundaram, P and Umarji, AM and Biswas, SK (1993) Effect of Lanthanum Substitution at the Barium Site on the Mechanical Behaviour in YBCO Superconductor. In: Materials Research Bulletin, 28 (1). pp. 73-80.
Rao, CNR and Nagarajan, R and Vijayaraghavan, R and Vasanthacharya, NY and Kulkarni, GV and Umarji, AM and Rao, Rango G and Somasundaram, P and Subbanna, GN and Raju, AR and Sood, AK and Chandrabhas, N (1990) Superconducting cuprates of the series $Bi_2Ca_{1-x}Ln_xSr_2Cu_2O_{8+\delta}$ (Ln=rare earth or Y). In: Superconductor Science and Technology, 3 (5). pp. 242-248.
Somasundaram, P and Ram, Mohan A and Umarji, AM and Rao, CNR (1990) Synthesis and characterization of superconducting $YbBa_2Cu_3O_{7-\delta}$ and $Y_{1-x}Lu_xBa_2Cu_3O_{7-\delta}$ (0.0<x<0.75): lower limit of the rare-earth ion radius tolerated in the 123 cuprate system. In: Materials Research Bulletin, 25 (3). pp. 331-335.
Somasundaram, P and Vijayaraghavan, R and Nagarajan, R and Seshadri, Ram and Umarji, AM and Rao, CNR (1990) Occurrence of maximum Tc at an optimal carrier concentration in superconducting bismuth and thallium cuprates. In: Applied Physics Letters, 56 (5). pp. 487-489.
Somasundaram, P and Umarji, AM (1990) Effect of Sb substitution on the superconductivity of $Bi_2 (Ca, Sr)_{n+1} Cu_n O_{4+2}$ (n = 1, 2 and 3) systems. In: Pramana, 35 (4). pp. 369-375.
Somasundaram, P and Nanjundaswamy, KS and Umarji, AM and Rao, CNR (1988) Structure and superconducting properties of $YBa_{2-x}Ln_xCu_3O_{7\pm\delta}$ (Ln = La, Nd or Gd) and $(Ln,Ln')_{3−x}Ba_{3+x}Cu_6O_{14+\delta}$. In: Materials Research Bulletin, 23 (8). pp. 1139-1144.
Umarjia, AM and Somasundaram, P and Rao, CNR (1988) Y3-xBa3+xCu6O14+δ system: A new family of superconductors. In: Physica C: Superconductivity, 153-15 (1). pp. 497-498.
Rao, CNR and Umarji, AM and Ram, Mohan RA and Vijayaraghavan, R and Swamy, Nanjunda KS and Somasundaram, P and Ganapathi, L (1988) High-temperature superconductivity in bismuth-copper oxides of the type BimMnCupOx (M=Mg, Ca, Sr, Ba, Bi). In: Pramana - Journal of Physics, 30 (4). L359-L366.
Umarji, AM and Somasundaram, P and Ganapathi, L and Rao, CNR (1988) The Y3?xBa3+xCu6O14+? system of superconductors. In: Solid State Communications, 66 (2). 177-180 .
