18, 245-254 (2009); Uneven horizon or several words about the superfluid $^4$He theory, arXiv:0904.4434.

C. Enss and S. Hunklinger, Low Temperature Physics, Springer Verlag, Berlin, (2005).

Y.S. Jain, [*The p=0 condensate is a myth*]{}, arxiv:cond-mat/1008.240v2

\(a) Y.S. Jain, Ind. J. Phys. 79, 1009-14 (2005); more detailed theory is available in (b).

(b)Y.S. Jain, Macro-orbitals and microscopic theory of a system of interacting bosons, arXiv:cond-mat/0606571; a most recently edited version of this paper which discusses several other aspects of the system (submitted for publication) is available as pdf file with the author.

S. Chutia, Ph.D. Thesis, Department of Physics, NEHU, Shillong-793022, India

Y.S. Jain, [*A study of thermal excitations of liquid helium-4 using macro-orbital microscopic theory*]{}, arxiv:cond-mat/0609418.

S Dey, J P Gewali, A K Jha, L Chhaigte and Y S Jain, Ind. J. Phys, Ind. J. Phys. Vol. 85, 1309-1330 (2011).

J. Wilks, The Properties of Liquid and Solid Helium, Clarendon Press, Oxford, 1967. Y.S. Jain, L. Chhangte, S. Chutia and S. Dey, Current Science 101, 769-775 (2011).

Y. S. Jain, B. Singh and B. N. Khanna. Pramana,-the J. Phys. 18, 511 (1982). R.P. Feynman, Applications of Quantum Mechanics to Liquid Helium, Progress in Low Temperature Physics (C.J. Gorter, editor). 1 