I'm using these two books:
Signals and Systems, 2a. ed., Prentice-Hall, 1996, A.V., Oppenheim, A.S. Wilsky with S.H. Nawab. Signals and Systems, 2nd Edition, 2002 Simon Haykin, Barry Van Veen.
Design a linear phase low pass filter whose specification is:1) Maximum tolerance in the passband equal to 0.01% (linear) in the passband;2) Cutoff frequency at ω_c = 0.3π and transition band at 0.05π;3) Minimum reduction of the 0.95 rejection band.