\input zb-basic \input zb-ioport \iteman{io-port 70779392} \itemau{P\'eladan-Germa, Ariane} \itemti{Testing identities of series defined by algebraic partial differential equations} \itemso{AAECC, 393-407 (1995).} \itemcc{} \itemut{} \itemli{doi:10.1007/3-540-60114-7\_30} \end