History-independent tracers. Forgetful molecular probes of the physical conditions of the dense interstellar medium
2007 ◽
Vol 469
(2)
◽
pp. 425-436
◽
Keyword(s):
Keyword(s):
2009 ◽
Vol 699
(2)
◽
pp. 1660-1678
◽
2011 ◽
Vol 415
(4)
◽
pp. 3473-3484
◽