added first RRF memo version

doc/memos/rrf/rrf.bib

@@ -0,0 +1,29 @@
+@Article{ Riseman90,
+	title = {{The Rotating Reference Frame Transformation in $\mu$SR}},
+	author = "T. M. Riseman and J. H. Brewer",
+	journal = "Hyperfine Interact.",
+	volume = "65",
+	year = "1990",
+	pages = "1107"
+}
+
+@Misc{ HAL9500,
+	title = {{HAL-9500}},
+	author = "",
+	note = {{\verb!https://www.psi.ch/smus/hal-9500!}},
+}
+
+@book{ King89,
+  Address =      {New York},
+  Author =       {R. King and M. Ahmadi and R. Gorgui-Naguib and A. Kwabwe and M. Azimi-Sajadi},
+  Edition =      {1st},
+  Publisher =    {Plenum Press},
+  Title =        {Digital Filtering in one and two Dimensions},
+  Year =         1989
+}
+
+@Misc{ musrfit_userManual15,
+	title = {{Musrfit User Guide}},
+	author = "",
+	note = {{\verb!https://intranet.psi.ch/MUSR/MusrFit#A_5.3_Asymmetry_Fit!}},
+}