@article{Urbanowski:2009,
author
=
"K.Urbanowski",
title
=
"On masses of unstable particles and their antiparticles in the CPT-invariant system",
journal
=
"Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
volume
=
"Vol. 540",
pages
=
"89--96",
year
=
"2002",
}