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3 papers found searching for titles, tags, and texts that contain "Todrá"  (expanded to "(Todrá|Didrah|Didra|Podra|Modra|Kodra)").  Sorting results by frequency of citation.
Hub papers (cite group members):   1 by smith1973eastern    top 5
Authority papers (cited by & in group):   1 of gregerson1973development    top 5
Co-citations (either in / outside group):   2 by thomas1966mon    top 5
Authoritative authors (most in group)   1 by Sidwell    top 5
Highly cited authors (by these papers)   2 of Gregerson    top 5
Publication hubs (for these papers)   3 by The Mon-Khmer Studies Journal    top 5

DJVU PDF Gregerson, Kenneth and Kenneth Smith. 1973. "The Development of TÆ¡drah Register." In The Mon-Khmer Studies Journal, 4: 143-184. cite.
(12) First context: ...nchronic aspects 11 Didra register 12 Mddra r...STATS (5)
DJVU PDF Sidwell, Paul. 2002. "Genetic Classification of the Bahnaric Languages: A Comprehensive Review." In The Mon-Khmer Studies Journal, 32: 1-24. cite.
(2) First context: ...Monom Rengao Sedang Didra Hre • Cua Figure 4 ...STATS (2)
DJVU PDF Smith, Kenneth. 1973. "Eastern North Bahnaric: Cua and KÆ¡tua." In The Mon-Khmer Studies Journal, 4: 113-118. cite.
(2) First context: ...nasals to stops The Modra shift however is mo...STATS (1)