Now, more for the contemporary music. For the notes above the regular three registers: C''''- F'''' fingerings.
The fourth Octave on the Flute by Marta Munoz
Also, refer to Jenniffer Cluff's quite comprehensive website: www.jennifercluff.com/fingering.htm
#reviewing the East Wind by Shulamit Ran, and the (E)crit by Holliger.