Geodesic
On the All-Union conference on non-Euclidean geometry – “150 Years of Lobachevsky's Geometry” (Kazan, 30.VI – 2.VII – 1976)
Trudy Geometricheskogo Seminara, Trudy Geometricheskogo Seminara, Tome 10 (1978), pp. 6-17 
B. L. Laptev. On the All-Union conference on non-Euclidean geometry – “150 Years of Lobachevsky's Geometry” (Kazan, 30.VI – 2.VII – 1976). Trudy Geometricheskogo Seminara, Trudy Geometricheskogo Seminara, Tome 10 (1978), pp. 6-17. http://geodesic.mathdoc.fr/item/KUTGS_1978_10_a1/
@article{KUTGS_1978_10_a1,
     author = {B. L. Laptev},
     title = {On the {All-Union} conference on {non-Euclidean} geometry {\textendash} {\textquotedblleft}150 {Years} of {Lobachevsky's} {Geometry{\textquotedblright}} {(Kazan,} {30.VI} {\textendash} {2.VII} {\textendash} 1976)},
     journal = {Trudy Geometricheskogo Seminara},
     pages = {6--17},
     year = {1978},
     volume = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUTGS_1978_10_a1/}
}
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%D 1978
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