TY  - BOOK
AU  - Lie,Sophus
TI  - Über Integralinvarianten und Differentialgleichungen
AV  - QA 
PY  - 2008///
CY  - Salt Lake City, UT
PB  - Project Gutenberg
KW  - Differential equations
KW  - Integrals
N1  - Release date is 2008-04-24; Original publication data not identified
UR  - https://www.gutenberg.org/ebooks/25157
ER  -