evolutionary approach "partitions" of wheel graph 1 Biology, life sciences 1 Birkhoff diamond 1 COVID-19 1 Cartesian product 1 DD index 1 Edge Wiener 1 Facebook 1 Kazakhstan 1 Kempe chain 1 Kempe-locking 1 Lithuanian case 1 Mycielskian graph 1 NP-hard 1 PI index 1 Research & information: general 1 Technology, engineering, agriculture 1 Wiener index 1 Zagreb indices 1 adjacent matrix 1 agri-food cooperatives 1 agricultural cooperative 1 agricultural cooperatives 1 agricultural economic function perception 1 agricultural markets 1 agricultural non-economic function perception 1 agricultural producer organizations 1 agroindustrial 1 approval 1