R. Hajer
发表
H. Lobna,
Elouaer Mohamed Aymen,
R. Hajer,
2017,
European Journal of Plant Pathology.
P. Henricks,
F. Nijkamp,
R. Hajer,
1997,
The Veterinary quarterly.
R. Hajer,
H. J. Breukink,
R. A. van Nieuwstadt,
1994,
The Veterinary quarterly.
P. Henricks,
F. Nijkamp,
R. Hajer,
1990,
Zentralblatt fur Veterinarmedizin. Reihe A.
J. Verhoeff,
R. Hajer,
T. S. van den Ingh,
1985,
The Veterinary Record.
P. Lekeux,
R. Hajer,
H. J. Breukink,
1984,
American journal of veterinary research.
P. Lekeux,
R. Hajer,
H. J. Breukink,
1984,
Canadian journal of comparative medicine : Revue canadienne de medecine comparee.
P. Lekeux,
R. Hajer,
H. J. Breukink,
1984,
American journal of veterinary research.
P. Lekeux,
R. Hajer,
H. J. Breukink,
1985,
American journal of veterinary research.
M. Verstegen,
P. Lekeux,
R. Hajer,
1985,
Canadian journal of comparative medicine : Revue canadienne de medecine comparee.
P. Lekeux,
R. Hajer,
T. S. van den Ingh,
1985,
American Journal of Veterinary Research.
H. Lobna,
R. Hajer,
M’Hamdi-Boughalleb Naima,
2016
.
M. Mars,
R. Hajer,
T. S. van den Ingh,
1994,
The Veterinary quarterly.
P. Lekeux,
J. Verhoeff,
R. Hajer,
1985,
Research in Veterinary Science.
R. Hajer,
1988,
Veterinary Record.
P. Lekeux,
R. Hajer,
H. J. Breukink,
1985,
Research in veterinary science.
J. T. Lumeij,
K. Dik,
R. Hajer,
1987,
Veterinary Record.
R. Hajer,
Ii. L. Sasse,
1978
.