@article{Urbanowski:2009,
author
=
"K.Urbanowski",
title
=
"Early time properties of time evolution in two-dimensional subspace and CP violation problem",
journal
=
"International Journal of Modern Physics A",
volume
=
"Vol. 8",
number
=
"no 21",
pages
=
"3721--3745",
year
=
"1993",
}