Johansen, E. : A New Technique for Oral Examination of Rodents , J. D. Res. 31: 361, 1952.
2.
Keyes, P.H.: A Method of Recording and Scoring Gross Carious Lesions in the Molar Teeth of the Syrian Hamster, J. D. Res. 23: 439, 1944.
3.
Mitchell, D.F. : The Production of Periodontal Disease in the Hamster as Related to Diet, Coprophagy, and Maintenance Factors, J. D. Res. 29: 732, 1950.
