1. ^[https://books.google.com/books?id=o_cKAAAAIAAJ&pg=PA141&lpg=PA141&dq=zona+Popiela&source=bl&ots=MzR4-YInD6&sig=f0P5FTYVX6f4nUERvEWDqPajNaM&hl=en&ei=5cpHS4LWKYfYsQPWlc31Dw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CAgQ6AEwAA#v=onepage&q=zona%20Popiela&f=false Historya narodu polskiego], Volumes 3-4. By Adam Naruszewicz, 1836. See: chapter "Podług rękopisma Puławskiego". As noted by Naruszewicz, the name of Popiel's wife has not been specified neither by Marcin Kromer nor by Wincenty Kadłubek.
2. ^The Catholic Church in Poland: Saints. {{webarchive|url=https://web.archive.org/web/20090208171824/http://beatchen.www1.50megs.com/ksjacek/rcc_in_p.htm |date=2009-02-08 }} Quote: "Blessed Rycheza (Ryksa) (+1063), Queen, wife of [the] King Mieszko II [21.5]"
3. ^{{MLCC |warning=1 |url=http://fmg.ac/Projects/MedLands/POLAND.htm |title-date= |title= RYKSA, (1018 - after 1059).|date=August 2012}} Quote: "The Gesta Hungarorum records the marriage of Béla and 'filia Miskæ (Polonorum duce)' while he was in exile in Poland but does not name her. Ryksa is shown as her possible name in Europäische Stammtafeln, but the primary source on which this is based has not been identified.
4. ^Note: Richeza was also called Ryksa Waldemarówna or Ryksa Szwedzka in Poland