no. 2
FPOL systems generating counting languages
RAIRO. Informatique théorique, Tome 15 (1981) no. 2, pp. 161-173. 
@article{ITA_1981__15_2_161_0,
     author = {Ehrenfeucht, A. and Rozenberg, G.},
     title = {FPOL systems generating counting languages},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {161--173},
     publisher = {EDP-Sciences},
     volume = {15},
     number = {2},
     year = {1981},
     mrnumber = {618453},
     zbl = {0469.68077},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1981__15_2_161_0/}
}
TY  - JOUR
AU  - Ehrenfeucht, A.
AU  - Rozenberg, G.
TI  - FPOL systems generating counting languages
JO  - RAIRO. Informatique théorique
PY  - 1981
SP  - 161
EP  - 173
VL  - 15
IS  - 2
PB  - EDP-Sciences
UR  - http://archive.numdam.org/item/ITA_1981__15_2_161_0/
LA  - en
ID  - ITA_1981__15_2_161_0
ER  - 
%0 Journal Article
%A Ehrenfeucht, A.
%A Rozenberg, G.
%T FPOL systems generating counting languages
%J RAIRO. Informatique théorique
%D 1981
%P 161-173
%V 15
%N 2
%I EDP-Sciences
%U http://archive.numdam.org/item/ITA_1981__15_2_161_0/
%G en
%F ITA_1981__15_2_161_0
Ehrenfeucht, A.; Rozenberg, G. FPOL systems generating counting languages. RAIRO. Informatique théorique, Tome 15 (1981) no. 2, pp. 161-173. http://archive.numdam.org/item/ITA_1981__15_2_161_0/

1. A. Ehrenfeucht and G. Rozenberg, On O-determined EOL languages, in A. LINDENMAYER and G. ROZENBERG, Eds., Automata, Languages, Development, North Holland, Amsterdam, 1975, pp. 191-202. | MR

2. G. T. Herman and G. Rozenberg, Developmental Systems and Languages, North Holland Publishing Company, Amsterdam, 1975. | MR | Zbl

3. H. Maurer, G. Rozenberg, A. Salomaa and D. Wood, On pure EOL Forms, R.A.I.R.O., Informatique Théorique, Vol. 13, No. 4, 1979. | Numdam | MR