M. Petrak
发表
E. Hiller,
Ľubomír Jurkovič,
Jaroslav Vozár,
2013,
Environmental Science and Pollution Research.
M. Petrak,
1969
.
P. Janoš,
M. Petrak,
1991
.
M. McMillan,
M. Petrak,
1989
.
M. Petrak,
F. M. Moore,
1985,
Avian diseases.
S. Sommers,
M. Petrak,
A. Strande,
1954,
A.M.A. archives of pathology.
M. McMillan,
M. Petrak,
F. M. Moore,
1988,
Avian diseases.
L. Lowenstine,
M. Petrak,
1980
.
R. Murtaugh,
M. Petrak,
D. Ringler,
1986,
Journal of the American Veterinary Medical Association.
P. Janoš,
M. Petrak,
1991
.
M. McMillan,
M. Petrak,
F. M. Moore,
1991,
Journal of the American Veterinary Medical Association.