N. Hozumi

Mathematical proof of closed form expressions for finite difference approximations based on Taylor series

Ishtiaq Rasool Khan, Ryoji Ohba, I. R. Khan, 2003 .

Mathematical proof of explicit formulas for tap-coefficients of full-band FIR digital differentiators

Ishtiaq Rasool Khan, Ryoji Ohba, I. R. Khan, 2000 .