○inhomogenious X-ray heating
21 cm signal from cosmic dawn: Imprints of spin temperature and fluctuations and peculiar velocities(Raghunath Ghara,T. Roy Choudhury and Kanan K. Datta)
21 cm fluctuations from inhomogeneous X-ray heating before reionization(Pritchard, Loeb)
○1-point statistics
Distinguishing models of reionization using future radio observations of 21-cm 1-point statistics(Catherine A.Watkinson, Jonathan R. Pritchard)
The Difference PDF of 21-cm Fluctuations: A Powerful Statistical Tool for Probing Cosmic Reionization (Rennan Barkana (Tel Aviv University), Abraham Loeb (Harvard University)
Detection and extraction of signals from the epoch of reionization using higher order one-point statistics(Geraint J. A. Harker (1), Saleem Zaroubi (1))
Yokoyama
http://arxiv.org/abs/0708.2424 (High-z 21cm fluctuations due to the fluctuation of spin temperature)
http://arxiv.org/abs/astro-ph/0610054 (Higher order contribution to relatively low-z 21cm power spectrum)
http://arxiv.org/abs/arXiv:0802.1710 (Fitting formula for relatively low-z 21cm power spectrum)