Gerhard Ringel has written:
'Map color theorem' -- subject(s): Map-coloring problem
'Topics in Combinatorics and Graph Theory'
Gerhard Ringel died in 2008.
Gerhard Ringel was born in 1919.
Gerhard Schornhorst has written: 'Gerhard Scharnhorst'
Gerhard Sommerhoff has written: 'Mexiko'
Gerhard Swoboda has written: 'Metamorphosen'
Gerhard Linn has written: 'Okumene'
Gerhard Roos has written: 'Eliten'
Gerhard Murza has written: 'Rostock'
Gerhard Dengler has written: 'Die \\'
Gerhard Moltsen has written: 'Alexandra'
Gerhard Kowalewski has written: 'Integralreichungen'
Gerhard Rebmann has written: 'Bekleidungsworterbuch'