Between early 1960s and late 1980s, Cuba launched a number of 'external' operations, ranging from 'de facto private enterprises' (like those by Che Guevara in the DR Congo and Bolivia), through 'development support of progressive governments' (like in Algeria of the mid-1960s), via 'deployments of advisors' (like in former South Yemen of early 1970s, Syria of 1973), to 'military interventions' (like in Angola of 1975-1989, and Ethiopia of 1977-1984).
In sense of availability of well-substantiated, authoritative and balanced publications, Che's adventures around Latin America are probably the best-covered topic. However, when it comes to 'Cuba's military performance', and then 'in Africa', I do not know about one, authoritative, 'single point of reference' for all the affairs there. Only the Cuban intervention in Angola can be described as 'well-covered', and that in Ethiopia as 'reasonably well-covered'. Most of the coverage of other of Cuban 'externals' is within realms of 'legends, myths and rumours'.
The most authoritative and balanced publication I know about is the much-ignored The Cuban Intervention in Angola, 1965-1991: From Che Guevara to Cuito Cuanavale. It's expensive to get nowadays, but worth every pence for anybody with serious interest in this topic.
There are slightly more of well-supported publications about Cuban reasoning, decision-making processes, and politics in regards of specific of their externals in Africa. Foremost between these is Piero Gleijeses' Havana, Washington and Africa, 1959-1976. Although not 'perfectly balanced', it's something like a 'must read', 'impossible to beat' in regards of authoritativeness, and in regards of topics it covers (from Algeria to Angola).
Various books and articles by Ethiopian historian Gebru Tareke are offering reasonably good coverage of Cuban operations during Ogaden War of 1977-1978. Good example is his article The Ethiopia-Somalia War of 1977 Revisited.
A cheaper and simpler to read ('to the point') alternative would be Wings over Ogaden.
Hope, we can expect much more in this regards over the coming years, then Cuba played a much more important role in many African conflicts of the 1970s and 1980s than is generally known.