https://pure.psu.edu/en/publications/improved-method-for-the-synthesis-of-polyorganophosphazenes-and-h/
Improved Method for the Synthesis of Poly(organophosphazenes) and Hindered Cyclophosphazenes - Penn...
for the
https://pure.psu.edu/en/publications/new-polyorganophosphazenes-prepared-by-polymerization-of-mono-alk/
NEW POLY(ORGANOPHOSPHAZENES) PREPARED BY POLYMERIZATION OF MONO-ALKYL AND...
newpolypreparedmono