- ?
?
, . , - 1969 . , , 1981 12 .
, . , . 99,8- .
, , 1979 . .
, 1983-84 , , 117 .
, . , .
- , . , , 1969 . , 1966 .
Proceedings of the National Academy of Sciences
:
31/10/2007
-