ON CENTRAL HOLE IN NGC 2237-2246

[1] STELLAR RADIAL VELOCITIES IN PERSEUS ARM [J]. ASTROPHYSICAL JOURNAL, 1963, 138 (04) : 1002 - &

[2] Allen C.W., 1963, ASTROPHYSICAL QUANTI

[3] Aller L.H., 1961, ABUNDANCE ELEMENTS

[4] Bates D.R., 1962, ATOMIC MOLECULAR PRO, P249

[5] BOTTINEL.L, 1964, ANN ASTROPHYS, V27, P685

[6] X-RAY SOURCES IN GALAXY [J]. NATURE, 1964, 201 (492) : 1307 - +

[7] EXCITATION CONDITIONS IN HII REGIONS IN SPIRAL AND IRREGULAR GALAXIES [J]. ASTROPHYSICAL JOURNAL, 1963, 138 (04) : 945 - &

[8] A SUPERLUMINOUS B-TYPE STAR IN THE LARGE MAGELLANIC CLOUD, AND ITS GALACTIC COUNTERPART [J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1958, 70 (414) : 261 - &

[9] NEUTRAL HYDROGEN IN GALACTIC STAR CLUSTERS .2. THE RELATION BETWEEN NEUTRAL AND IONIZED HYDROGEN IN A SECTION THROUGH CYGNUS-X [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1963, 127 (01) : 61 - 70

[10] DIBAI EA, 1958, SOV ASTRON, V2, P429

[1] STELLAR RADIAL VELOCITIES IN PERSEUS ARM [J]. ASTROPHYSICAL JOURNAL, 1963, 138 (04) : 1002 - &

[2] Allen C.W., 1963, ASTROPHYSICAL QUANTI

[3] Aller L.H., 1961, ABUNDANCE ELEMENTS

[4] Bates D.R., 1962, ATOMIC MOLECULAR PRO, P249

[5] BOTTINEL.L, 1964, ANN ASTROPHYS, V27, P685

[6] X-RAY SOURCES IN GALAXY [J]. NATURE, 1964, 201 (492) : 1307 - +

[7] EXCITATION CONDITIONS IN HII REGIONS IN SPIRAL AND IRREGULAR GALAXIES [J]. ASTROPHYSICAL JOURNAL, 1963, 138 (04) : 945 - &

[8] A SUPERLUMINOUS B-TYPE STAR IN THE LARGE MAGELLANIC CLOUD, AND ITS GALACTIC COUNTERPART [J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1958, 70 (414) : 261 - &

[9] NEUTRAL HYDROGEN IN GALACTIC STAR CLUSTERS .2. THE RELATION BETWEEN NEUTRAL AND IONIZED HYDROGEN IN A SECTION THROUGH CYGNUS-X [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1963, 127 (01) : 61 - 70

[10] DIBAI EA, 1958, SOV ASTRON, V2, P429