%0 Journal Article
%A I. N. Parasidis
%A P. C. Tsekrekos
%A T. G. Lokkas
%T Correct and self-adjoint problems for biquadratic operators
%J Zapiski Nauchnykh Seminarov POMI
%D 2011
%P 145-162
%V 387
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_2011_387_a5/
%G en
%F ZNSL_2011_387_a5