@article{10_4064_fm_134_1_15_35,
     author = {Nikolaos Marmaridis},
     title = {One point extensions of trees and quadratic forms},
     journal = {Fundamenta Mathematicae},
     pages = {15--35},
     publisher = {mathdoc},
     volume = {134},
     number = {1},
     year = {1990},
     doi = {10.4064/fm-134-1-15-35},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-134-1-15-35/}
}