Comparison of filter magnitude between Butterworth-, Legendre- and Tschebyscheff-Type1-Filter
<a href="//commons.wikimedia.org/wiki/User:%D0%94.%D0%98%D0%BB%D1%8C%D0%B8%D0%BD" title="User:Д.Ильин">Д.Ильин</a>
<a href="//commons.wikimedia.org/wiki/File:Comparison_Butterworth_Legendre_Chebyshev.svg" title="File:Comparison Butterworth Legendre Chebyshev.svg">File:Comparison Butterworth Legendre Chebyshev.svg</a> by <a href="//commons.wikimedia.org/wiki/User:Wdwd" title="User:Wdwd">Wdwd</a>