@article{TM_1975_135_a18,
     author = {H. Lehmann},
     title = {Chiral-invariant field theory and pionpion scattering},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {174--177},
     publisher = {mathdoc},
     volume = {135},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM_1975_135_a18/}
}