1
by Călugăreanu, Grigore
Published 2000
Springer Netherlands

2
by Cǎlugǎreanu, Grigore, Hamburg, Peter
Published 1998
Springer Netherlands

3
by Călugăreanu, Grigore, Breaz, Simion, Modoi, Ciprian, Pelea, Cosmin
Published 2003
Springer Netherlands