TY  - GEN
T1  - A novel solution to the undamped duffing's equation of the hardening type
A1  - De Lara, Dennis Noel
A2  - Que, Norbert S.
LA  - English
UL  - https://ds.mainlib.upd.edu.ph/Record/UP-99796217610914766
CN  - TD 195 H37 2010
KW  - Mathematics : Formulae.
ER  -