\Bibitem{Shi75} \by F.~Shipp \paper Rearrangements of series in the Walsh system \jour Mat. Zametki \yr 1975 \vol 18 \issue 2 \pages 193--201 \mathnet{http://mi.mathnet.ru/mzm7642} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=390633} \zmath{https://zbmath.org/?q=an:0349.42013} \transl \jour Math. Notes \yr 1975 \vol 18 \issue 2 \pages 701--706 \crossref{https://doi.org/10.1007/BF01818035}