# A general theory on frequency and time–frequency analysis of irregularly sampled time series based on projection methods – Part 1: Frequency analysis

> Research article (Nonlinear processes in geophysics, 2018) · cited 18× · AI/ML

**Wikidata**: [openalex:W2728114477](https://www.wikidata.org/wiki/openalex:W2728114477)  
**Source**: https://4ort.xyz/entity/a-general-theory-on-frequency-and-timefrequency-analysis-of-irregularly-sampled-time-series-based-on-projection-methods-