TY  - RPRT
TI  - Fixed Future and Uncertain Past: Theorems Explain Why It Is Often More Difficult to Reconstruct the Past Than to Predict the Future
AU  - Alefeld, Goetz
AU  - Koshelev, Misha
AU  - Mayer, Guenter
PY  - 1997
UR  - https://ntrs.nasa.gov/citations/20010000364
ID  - 20010000364
ER  -