TY  - JOUR
A1  - Kostaki, A.
T1  - A nine-parameter version of the Heligman-Pollard formula
Y1  - 1992
DO  - 10.1080/08898489209525346
JF  - Mathematical population studies
VL  - 3
IS  - 4
SP  - 277
EP  - -288

ER  -