TY  - BOOK
AU  - Lehto,Olli
AU  - Virtanen,K.I.
TI  - On the Behavior of Meromorphic Functions in the Neighbourhood of an Isolated Singularity
T2  - Annales Academiae Scientiarum Fennicae ; 
PY  - 1957///
CY  - Helsinki : 
PB  - Suomalainen Tiedeakatemia, 
ER  -