. . . . . "viable quaternion-based complementary observers" . . "Viable complementary observers that are based on quaternions" . . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCJlM78d80R+gFMoQB1IG3f7AbqqGOCIv4HmZd1cx1KgEWMUUpPsojFNvx84fC/TltcJ8F8JafnbhDXW2HM2MhdK4yC04ROEV1vIgSzjDicHfiqXvMqdPuMyQp4mmCEY7mUoeEW10mWZqjk+S9TnmiAQbFGcpExP8aosr2aTR7CSQIDAQAB" . "ALYEucxJ/GkvrAPPX9WB5FLowEQssHoQ7OJ96DRAyfoXScBQx4fMTHZAdOe+qe02dGqsqLrCdOe4f/PJQ7IoFkX8ODJudSHpKH2X9jJmDahZsqNN8fRubE0199EtOFVV9zXwclJvVt4OuVrFm0zAalptKvV11IhV4US4PFNMVmA=" . . "2021-01-25T15:38:58.311+02:00"^^ . . . . . .