Albert L. Lloyd, Rosemarie Lühr. Etymologisches Wörterbuch des Althochdeutschen IV. Vandenhoeck & Ruprecht, 2009. (ISBN 978-3-525-20770-3). s. v. 'girîchan'. (https://ewa.saw-leipzig.de/articles/gir%C3%AEchan)
girîchan s. girîchan st. v. I. —girîchen s. girîchen sw. v. I. —girîchên s. girîchên sw. v. III. —girîchisôn s. girîchisôn sw. v. II.
Albert L. Lloyd, Rosemarie Lühr. Etymologisches Wörterbuch des Althochdeutschen IV. Vandenhoeck & Ruprecht, 2009. (ISBN 978-3-525-20770-3). s. v. 'girîchan'. (https://ewa.saw-leipzig.de/articles/gir%C3%AEchan)