1. Chui CK (1992) An introduction on wavelets. SIAM, Philadelphia
2. ISO 11562 (1996) Geometrical product specifications (GPS) – surface texture: profile method: metrological characteristics of phase correct filters. International Organization for Standardization, Geneva
3. ISO 12085 (1996) Geometrical product specifications (GPS) – surface texture: profile method: motif parameters. International Organization for Standardization, Geneva
4. ISO 16610 part 21 (2011) Geometrical product specification (GPS) – filtration: linear profile filters: Gaussian filters. International Organization for Standardization, Geneva
5. ISO 16610 part 22 (2015) Geometrical product specification (GPS) – filtration: linear profile filters: spline filters. International Organization for Standardization, Geneva