TY - JOUR A1 - Ortiz de Adler, N. A1 - Elias, A. G. T1 - Latitudinal variation of foF2 hysteresis of solar cycles 20, 21 and 22 and its application to the analysis of long-term trends JO - Ann. Geophys. J1 - ANGEO VL - 26 IS - 5 SP - 1269 EP - 1273 Y1 - 2008/05/28 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/26/1269/2008/ L1 - https://angeo.copernicus.org/articles/26/1269/2008/angeo-26-1269-2008.pdf DO - 10.5194/angeo-26-1269-2008 ER -