Swapnil Swapnil, 
                    "SECONDARY QUEUING MODELS FOR RAILWAY RESERV ATION SYSTEM WITH TRUNCATION OF THE RANGE OF PROBABILITY OF SUR-RENDERING RESERVED TICKETS.". , vol:
                    2, No.3
                    Jan. 1970, pp: , https://scholar9.com/publication-detail/secondary-queuing-models-for-railway-reserv-ation-20834
                
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