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    title   = {Biogeochemistry of methane and methanogenic archaea in permafrost.},    
    author  = {Rivkina E, Shcherbakova V, Laurinavichius K, Petrovskaya L, Krivushin K, Kraev G, Pecheritsina S, Gilichinsky D},    
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    year    = {2007},    
    doi     = {10.1111/j.1574-6941.2007.00315.x},    
    pmid    = {17428301}        
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    title   = {The Effects of Perchlorates on the Permafrost Methanogens: Implication for Autotrophic Life on Mars.},    
    author  = {Shcherbakova V, Oshurkova V, Yoshimura Y.},    
    journal = {Microorganisms},    
    year    = {2015},    
    doi     = {10.3390/microorganisms3030518},    
    pmid    = {27682103}        
    }