Dear MARMAM,
  I am searching for the following references:

Savinetskii, A. B. (1992). Secular dynamics of the population of the sea cow (Hydrodamalis gigas, Zimm., 1780) in the Late Holocene. Doklady Akademii Nauk Sssr 326(3):570-572. 

Savinetsky, A. B. (1993). Ancient population dynamics of the sea cow (Hydrodamalis gigas Zimm., 1780) in the late Holocene. Doklady Biological Sciences (English Translation of Doklady Akademii Nauk Sssr) 326(1-6):403-405.

If anyone has access, I would very much appreciate if you would send me PDFs of the papers.
Thanks in advance,
Tom Jefferson
Clymene Enterprises
sclymene@aol.com