Gronwall–Bellman estimates for linear Volterra-type inequalities with delay

This research was partially supported by Agencia Estatal de Investigacion of Spain (under grant MTM2016-75140-P, cofunded by European Community fund FEDER) and Conselleria de Cultura, Educacion e Ordenacion Universitaria da Xunta de Galicia (under grants GRC2015/004 and R2016-022). Ministerio de Educacion, Cultura y Deporte of Spain (grant FPU16/04416) and Conselleria de Cultura, Educacion e Ordenacion Universitaria da Xunta de Galicia (grant ED481A-2017/030) also partially supported the research of Sebastian Buedo-Fernandez