V. Roytchev
发表
V. Roytchev,
1997
.
S. Karageorgiev,
V. Roytchev,
D. Terziisky,
1994
.
V. Roytchev,
2009
.
V. Roytchev,
1998,
American Journal of Enology and Viticulture.
N. Penov,
C. Christov,
V. Roytchev,
2009
.