@article{INTM_1977_14_a1,
     author = {\`E. R. Tsekanovskii and Yu. L. Shmul'yan},
     title = {Questions in the theory of the extension of unbounded operators in rigged {Hilbert} spaces},
     journal = {Itogi nauki i tehniki. Seri\^a, Matemati\v{c}eskij analiz},
     pages = {59--100},
     publisher = {mathdoc},
     volume = {14},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTM_1977_14_a1/}
}