15. Quantum corrections in an antiferromagnet:
A systematic diagrammatical treatment of the Hubbard model
A. Singh
Phys. Rev. B. 43, 3617-3625 (1991).

16. Magnetic dynamics in La₂CuO₄ with interlayer coupling and anisotropy gaps
A. Singh and Z. Tesanovic
Phys. Rev. B  43, 11445-11447 (1991).

17. The doped Hubbard antiferromagnet: instability and effective interactions
A. Singh, Z. Tesanovic, and Ju H. Kim
Phys. Rev. B  44, (Rapid Communications) 7757-7759 (1991).

18. Reply to Comment on: Magnetic dynamics in copper-oxide based antiferromagnets:
The role of interlayer coupling
A. Singh, Z. Tesanovic, H. Tang, G. Xiao, C. L. Chien, and J. C. Walker
Phys. Rev. Lett.  67, 1939 (1991).

19. The two-dimensional Hubbard antiferromagnet
A. Singh and Z. Tesanovic
Phys. Rev. B 45, 7258-7266 (1992).

20. Instability of the spiral state of the doped Hubbard model
A. Singh, Z. Tesanovic, and Ju H. Kim
Pramana  38, L211-L217 (1992).

21. Magnetic dynamics in La₂CuO₄
A. Singh
Current Science 62, 404-408 (1992).

22. Spin-wave spectral properties of the Mott-Hubbard antiferromagnet:
The intermediate-coupling regime
A. Singh
Phys. Rev. B  48, 6668-6671 (1993).

23. Self-consistent study of quantum spin fluctuations in the Mott-Hubbard antiferromagnet
A. Singh
Phys. Rev. B 48, 7700-7703 (1993).

24. Fermionic structure of the magnon interaction vertex in quantum magnets
A. Singh
Phys. Rev. B  48, 10546-10547 (1993).

25. Collective and single-particle excitations in a Hubbard antiferromagnet
P. Sen and A. Singh
Phys. Rev. B 48, 15792-15796 (1993).

26. Spin-rotationally-symmetric path-integral formulation of a generalized N-orbital Hubbard model
P. Maiti and A. Singh
Phys. Rev. B  49, 6078-6082 (1994).

27. Gap states, local moments and magnetic dynamics
in a Mott-Hubbard antiferromagnet doped with static impurities
P. Sen, S. Basu and A. Singh
Phys. Rev. B  50, (Rapid Communications) 10381-10384 (1994).

28. Gap states in a doped Mott-Hubbard insulator
P. Sen, S. Basu, and A. Singh
Pramana,  44, L77-L83 (1995).