@article{TMF_1993_95_2_a13,
     author = {A. Klemm and S. Theisen},
     title = {Recent efforts in the computation of string couplings},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {293--306},
     publisher = {mathdoc},
     volume = {95},
     number = {2},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TMF_1993_95_2_a13/}
}