Margetis, P.N. , and Hansen, W.C.Changes in Agar-Agar Type Duplicating Material and Agar-Agar on Heating and Storage, J.A.D.A., 54:737, 1957.
2.
Duke, B.R., and Ryge, G.Properties of Laboratory Duplicating Materials, D. Prog., 1:88, 1961.
3.
Paffenbarger, G.C., Stanford, J.W., and Sweeney, W.T.American Dental Association Specifications for Dental Materials, 1960-61, p. 44. Chicago: American Dental Association, 1960.
4.
Craig, R.G., and Peyton, F.A.Physical Properties of Elastic Duplicating Materials, J. D. Res., 39:391, 1960.
5.
Wood, E.J.F.Agar in Australia, pp. 1-43. Commonwealth of Australia Council for Scientific and Industrial Research Bull. No. 203, 1946.
6.
Pavlov, P.N. , and Engelshtein , M.M.Effect of Cations and Anions on the Tensile Strength of Agar and Gelatin, Colloid J. (U.S.S.R.), 2:821, 1936.