Chemical preservation of plants and insects in natural resins

by Stankiewicz, B. A., Poinar, H. N., Briggs, D. E. G., Evershed, R. P., Poinar, G. O.
Published 1998

Bacillus DNA in fossil bees: an ancient symbiosis?

by Cano, R J, Borucki, M K, Higby-Schweitzer, M, Poinar, H N, Poinar, G O, Pollard, K J
Published 1994